* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    max-width: 100%;
}

body,
html,
button,
input,
select,
textarea {
    font-family: 'Open Sans', sans-serif !important;
}

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --google-blue: #4285f4;
    --google-red: #ea4335;
    --google-yellow: #fbbc04;
    --google-green: #34a853;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --accent-purple: #9c27b0;
    --accent-orange: #ff6f00;
}

body.dark-mode {
    --bg-primary: #2b2e37;
    /* Arka plan belirgin şekilde daha açık */
    --bg-secondary: #3a3d46;
    /* Sekmeler, kart zeminleri biraz daha açık */
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --card-bg: #343742;
    /* Kartlar da aydınlatıldı */
    --card-border: rgba(0, 0, 0, 0.1);
}

html {
    overflow-x: hidden;
    width: 100%;
    scroll-behavior: smooth;
}

body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    position: relative;
    font-family: 'Courier New', Courier, monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background 0.3s, color 0.3s;
}

.doodle-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.05;
}

body.dark-mode .doodle-bg {
    opacity: 0.03;
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-primary);
    z-index: 1000;
    border-bottom: 3px solid var(--google-blue);
    box-shadow: 0 4px 20px rgba(66, 133, 244, 0.15);
    transition: all 0.3s;
}

.navbar.scrolled {
    padding: 12px 30px;
    box-shadow: 0 6px 30px rgba(66, 133, 244, 0.25);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: rgb(26, 26, 26);
    border: none;
    padding: 10px 15px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(39, 39, 40, 0.3);
}

.theme-toggle:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 25px rgba(29, 29, 30, 0.5);
}

.theme-toggle img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.logo {
    font-size: 24px;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.logo-text {
    background: linear-gradient(135deg,
            var(--google-blue) 0%,
            var(--google-blue) 25%,
            var(--google-red) 50%,
            var(--google-yellow) 75%,
            var(--google-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: professional-gradient 10s ease-in-out infinite;
    background-size: 200% 200%;
}

@keyframes gradient-shift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

@keyframes professional-gradient {
    0% {
        background-position: 0% 50%;
        filter: hue-rotate(0deg);
    }

    25% {
        background-position: 50% 0%;
        filter: hue-rotate(5deg);
    }

    50% {
        background-position: 100% 50%;
        filter: hue-rotate(0deg);
    }

    75% {
        background-position: 50% 100%;
        filter: hue-rotate(-5deg);
    }

    100% {
        background-position: 0% 50%;
        filter: hue-rotate(0deg);
    }
}

.nav-links {
    display: none;
    gap: 10px;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 700;
    font-size: 15px;
    padding: 8px 16px;
    border-radius: 20px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 3px;
    background: linear-gradient(90deg, var(--google-blue), var(--google-red), var(--google-yellow), var(--google-green));
    border-radius: 2px;
    transition: transform 0.3s;
}

.nav-links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-links a:hover {
    color: var(--google-blue);
    transform: translateY(-2px);
}

.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 28px;
    height: 4px;
    background: linear-gradient(90deg, var(--google-blue), var(--google-red));
    border-radius: 3px;
    transition: all 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-menu {
    position: fixed;
    top: 65px;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 3px solid var(--google-red);
    padding: 25px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s;
    z-index: 999;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 18px;
    font-weight: 700;
    padding: 12px 15px;
    display: block;
    border-radius: 15px;
    background: var(--card-bg);
    border: 2px solid transparent;
    transition: all 0.3s;
}

.mobile-menu a:hover {
    border-color: var(--google-blue);
    transform: translateX(10px);
}

.mobile-theme-toggle {
    width: 100%;
    margin-top: 20px;
    padding: 15px 20px;
    background: rgb(35, 34, 34);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    color: white;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(251, 188, 4, 0.4);
}

.mobile-theme-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(251, 188, 4, 0.6);
}

.mobile-theme-toggle img {
    width: 22px;
    height: 22px;
    filter: brightness(0) invert(1);
}

.hero {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background-size: 400% 400%;
    animation: gradient-move 15s ease infinite;
    padding: 100px 20px 50px;
    margin: 0;
    max-width: 100vw;
    z-index: 1;
}

@keyframes gradient-move {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.hero-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    animation: float-shape 20s infinite ease-in-out;
}

.shape1 {
    width: 80px;
    height: 80px;
    background: var(--google-blue);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape2 {
    width: 60px;
    height: 60px;
    background: var(--google-red);
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape3 {
    width: 100px;
    height: 100px;
    background: var(--google-yellow);
    bottom: 15%;
    left: 20%;
    animation-delay: 4s;
}

.shape4 {
    width: 70px;
    height: 70px;
    background: var(--google-green);
    top: 30%;
    right: 25%;
    animation-delay: 6s;
}

@keyframes float-shape {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(20px, -20px) rotate(90deg);
    }

    50% {
        transform: translate(-20px, 20px) rotate(180deg);
    }

    75% {
        transform: translate(20px, 20px) rotate(270deg);
    }
}

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 1200px;
    width: 100%;
    padding: 0 20px;
    position: relative;
}

.hero h1 {
    font-size: clamp(28px, 8vw, 90px);
    margin-bottom: clamp(15px, 4vw, 20px);
    background: linear-gradient(135deg,
            var(--google-blue) 0%,
            var(--google-blue) 30%,
            var(--google-red) 50%,
            var(--google-yellow) 70%,
            var(--google-green) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideUp 1s ease-out, professional-gradient 15s ease-in-out infinite 2s;
    line-height: 1.2;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: clamp(-3px, -1vw, -2px);
    text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.05);
    padding: 0 10px;
    word-wrap: break-word;
    hyphens: auto;
}

.hero .date-badge {
    display: inline-flex;
    align-items: center;
    background: transparent;
    padding: clamp(6px, 2vw, 12px) clamp(12px, 4vw, 20px);
    border-radius: 8px;
    font-size: clamp(14px, 3.5vw, 18px);
    font-weight: 900;
    color: var(--text-secondary);
    margin: clamp(10px, 3vw, 20px) auto;
    animation: slideUp 1s ease-out 0.2s backwards;
    border: 1px solid var(--text-secondary);
    opacity: 0.8;
    margin-top: 5px;
    max-width: 90%;
    justify-content: center;
    flex-wrap: wrap;
    text-align: center;
}

#date-svg,
#time-svg {
    width: clamp(16px, 4vw, 24px);
    height: clamp(16px, 4vw, 24px);
    margin-right: clamp(6px, 2vw, 10px);
    flex-shrink: 0;
    vertical-align: middle;
    fill: var(--text-secondary);
    stroke: var(--text-secondary);
}

body.dark-mode #date-svg,
body.dark-mode #time-svg {
    fill: white;
    stroke: white;
}

.hero p {
    font-size: clamp(18px, 4.5vw, 28px);
    color: var(--text-secondary);
    margin-bottom: 35px;
    animation: slideUp 1s ease-out 0.4s backwards;
    line-height: 1.6;
    font-weight: 600;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cta-button {
    display: inline-block;
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--google-blue), var(--google-green));
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 900;
    font-size: clamp(16px, 3.5vw, 20px);
    transition: transform 0.3s, box-shadow 0.3s;
    animation: slideUp 1s ease-out 0.6s backwards;
    margin: 10px;
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4);
    border: 3px solid white;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05) rotate(2deg);
    box-shadow: 0 12px 35px rgba(66, 133, 244, 0.6);
}

.cta-button.secondary {
    background: transparent;
    border: 3px solid var(--google-blue);
    color: var(--google-blue);
    box-shadow: none;
}

.cta-button.secondary:hover {
    background: var(--google-blue);
    color: white;
    transform: translateY(-5px) scale(1.05) rotate(-2deg);
}

section {
    padding: 80px 20px;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: clamp(24px, 6vw, 60px);
    text-align: center;
    margin-bottom: clamp(30px, 8vw, 50px);
    background: linear-gradient(135deg,
            var(--google-blue) 0%,
            var(--google-blue) 25%,
            var(--google-red) 50%,
            var(--google-yellow) 75%,
            var(--google-green) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
    width: 100%;
    animation: professional-gradient 12s ease-in-out infinite;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: clamp(-2px, -0.5vw, -1px);
    line-height: 1.2;
    padding: 0 10px;
    word-wrap: break-word;
    hyphens: auto;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 6px;
    background: linear-gradient(90deg,
            var(--google-blue),
            var(--google-red),
            var(--google-yellow),
            var(--google-green));
    border-radius: 3px;
}

.about-devfest {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 60px;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    border: 4px solid var(--google-blue);
}

.about-devfest p {
    font-size: clamp(17px, 3.8vw, 22px);
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
    font-weight: 500;
}

/* Text visibility control */
.desktop-text {
    display: block;
}

.mobile-text {
    display: none;
}

.devfest-logo {
    height: auto;
    max-width: clamp(200px, 50vw, 400px);
    width: 100%;
    margin: 0 auto 20px;
    display: block;
    margin-bottom: 75px;
    object-fit: contain;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.stat-card {
    background: var(--card-bg);
    padding: 35px 20px;
    border-radius: 25px;
    text-align: center;
    border: 4px solid;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 170px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.stat-card:nth-child(1) {
    border-color: var(--google-blue);
}

.stat-card:nth-child(2) {
    border-color: var(--google-red);
}

.stat-card:nth-child(3) {
    border-color: var(--google-yellow);
}

.stat-card:nth-child(4) {
    border-color: var(--google-green);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1));
    transform: rotate(45deg);
    transition: all 0.5s;
}

.stat-card:hover::before {
    top: 100%;
    right: 100%;
}

.stat-card:hover {
    transform: translateY(-10px) rotate(3deg);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.stat-number-red {
    font-size: clamp(40px, 7vw, 60px);
    background: rgb(231, 65, 65);
    font-weight: 900;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-number-blue {
    font-size: clamp(40px, 7vw, 60px);
    background: rgb(62, 175, 236);
    font-weight: 900;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-number-yellow {
    font-size: clamp(40px, 7vw, 60px);
    background: rgb(230, 171, 70);
    font-weight: 900;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-number-green {
    font-size: clamp(40px, 7vw, 60px);
    background: rgb(62, 178, 87);
    font-weight: 900;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-card:nth-child(2) .stat-number {
    background: linear-gradient(135deg, var(--google-red), var(--google-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: clamp(15px, 3.2vw, 20px);
    color: var(--text-primary);
    font-weight: 700;
    text-transform: uppercase;
}

.speakers-grid,
.prizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.speaker-card,
.prize-card {
    background: var(--card-bg);
    border-radius: 25px;
    overflow: hidden;
    border: 4px solid var(--google-blue);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
    padding: 35px 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.speaker-card:nth-child(2n) {
    border-color: var(--google-red);
}

.speaker-card:nth-child(3n) {
    border-color: var(--google-yellow);
}

.speaker-card:nth-child(4n) {
    border-color: var(--google-green);
}

.speaker-card:hover,
.prize-card:hover {
    transform: translateY(-12px) rotate(-2deg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.speaker-photo {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--google-blue), var(--google-green));
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 5px solid white;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    font-size: 52px;
    color: white;
}

.speaker-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    display: block;
    border-radius: 50%;
}

.speaker-name,
.prize-title {
    font-size: clamp(20px, 4vw, 24px);
    font-weight: 900;
    margin-bottom: 10px;
    color: var(--text-primary);
    text-transform: uppercase;
}

.speaker-title {
    font-size: clamp(14px, 3vw, 17px);
    color: var(--google-blue);
    margin-bottom: 12px;
    font-weight: 700;
}

.speaker-bio,
.prize-desc {
    font-size: clamp(13px, 2.8vw, 15px);
    color: var(--text-secondary);
    line-height: 1.7;
    font-weight: 500;
}

.schedule-container {
    max-width: 1000px;
    margin: 0 auto;
}

.schedule-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    border: 4px solid;
    margin-bottom: 25px;
    transition: transform 0.3s, box-shadow 0.3s;
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 25px;
    align-items: center;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.schedule-item:nth-child(1) {
    border-color: var(--google-blue);
}

.schedule-item:nth-child(2) {
    border-color: var(--google-red);
}

.schedule-item:nth-child(3) {
    border-color: var(--google-yellow);
}

.schedule-item:nth-child(4) {
    border-color: var(--google-green);
}

.schedule-item:nth-child(5) {
    border-color: var(--google-blue);
}

.schedule-item:nth-child(6) {
    border-color: var(--google-red);
}

.schedule-item:nth-child(7) {
    border-color: var(--google-yellow);
}

.schedule-item:nth-child(8) {
    border-color: var(--google-green);
}

.schedule-item:nth-child(9) {
    border-color: var(--google-blue);
}

.schedule-item:nth-child(10) {
    border-color: var(--google-red);
}

.schedule-item:nth-child(11) {
    border-color: var(--google-yellow);
}

.schedule-item:hover {
    transform: translateX(15px) rotate(1deg);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
}

.schedule-time-yellow {
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 900;
    color: white;
    text-align: center;
    padding: 18px;
    background: #fbbc04;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
}

.schedule-time-red {
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 900;
    color: white;
    text-align: center;
    padding: 18px;
    background: #ea4335;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
}

.schedule-time-blue {
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 900;
    color: white;
    text-align: center;
    padding: 18px;
    background: #366fd9;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
}

.schedule-time-green {
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 900;
    color: white;
    text-align: center;
    padding: 18px;
    background: #34a853;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
}

.schedule-content h3 {
    font-size: clamp(19px, 4vw, 24px);
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 900;
    text-transform: uppercase;
}

.schedule-content p {
    font-size: clamp(14px, 3vw, 17px);
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.schedule-speaker {
    color: var(--google-green);
    font-weight: 700;
}

.prize-card {
    border-color: var(--google-yellow);
}

.prize-card:nth-child(2n) {
    border-color: var(--google-red);
}

.prize-icon {
    font-size: 70px;
    margin-bottom: 20px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
    margin-top: 50px;
}

.sponsor-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sponsor-card img {
    max-width: 80%;
    max-height: 90px;
    object-fit: contain;
    filter: none;
    transition: transform 0.3s ease;
}

.sponsor-card img[alt="Google"] {
    max-width: 100%;
    max-height: 140px;
    /* İstersen burayı daha da artırabilirsin */
}

.sponsor-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.15);
}

.sponsor-card:hover img {
    transform: scale(1.03);
}

.cta-section {
    text-align: center;
    background: linear-gradient(135deg, var(--google-blue), var(--google-green));
    padding: 80px 30px;
    border-radius: 40px;
    margin: 30px 20px;
    border: 6px solid white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 50px rgba(66, 133, 244, 0.3);
}

.cta-section h2 {
    font-size: clamp(36px, 7vw, 70px);
    margin-bottom: 25px;
    color: white;
    font-weight: 900;
    text-transform: uppercase;
    text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.1);
}

@media (max-width: 1024px) {
    .sponsors-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .sponsors-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }

    .sponsor-card {
        padding: 16px;
        min-height: 100px;
    }

    .sponsor-card img {
        max-width: 85%;
        max-height: 60px;
    }

    .sponsor-card img[alt="Google"] {
        max-width: 90%;
        max-height: 80px;
    }
}

.cta-section p {
    font-size: clamp(18px, 4vw, 26px);
    margin-bottom: 40px;
    color: white;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    font-weight: 600;
}

.cta-section .cta-button {
    background: white;
    color: var(--google-blue);
    border: 4px solid white;
    font-size: clamp(18px, 3.5vw, 24px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.cta-section .cta-button:hover {
    background: var(--google-yellow);
    color: white;
    transform: translateY(-8px) scale(1.1) rotate(-3deg);
}

footer {
    background: #0a0a0a;
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    /* Added */
    z-index: 1;
    /* Added */
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.social-links svg {
    transition: all 0.3s;
}

.social-links svg:hover {
    transform: scale(1.2);
}

footer p {
    font-size: clamp(12px, 2.5vw, 14px);
    color: #666;
    margin: 10px 0;
}

@media (min-width: 768px) {
    .navbar {
        padding: 20px 50px;
    }

    .navbar.scrolled {
        padding: 15px 50px;
    }

    .logo {
        font-size: 28px;
    }

    .nav-links {
        display: flex;
    }

    .nav-links a {
        font-size: 16px;
    }

    .mobile-menu-btn {
        display: none;
    }

    .theme-toggle {
        display: flex;
    }

    .nav-right {
        gap: 30px;
    }

    .hero {
        padding: 120px 50px 80px;
    }

    section {
        padding: 100px 50px;
    }

    .schedule-item {
        grid-template-columns: 150px 1fr;
    }

    .speakers-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767px) {
    .schedule-item {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .schedule-time {
        margin-bottom: 10px;
    }

    .devfest-logo {
        max-width: clamp(150px, 70vw, 250px);
        margin-bottom: 40px;
    }

    .hero .date-badge {
        padding: 8px 12px;
        font-size: clamp(12px, 4vw, 16px);
        margin: 8px auto;
        max-width: 95%;
        flex-direction: row;
        gap: 4px;
    }

    #date-svg,
    #time-svg {
        width: clamp(14px, 5vw, 20px);
        height: clamp(14px, 5vw, 20px);
        margin-right: 6px;
    }

    .section-title {
        font-size: clamp(20px, 7vw, 36px);
        margin-bottom: 30px;
        padding: 0 15px;
        line-height: 1.3;
    }

    .hero h1 {
        font-size: clamp(24px, 9vw, 50px);
        margin-bottom: 15px;
        padding: 0 15px;
        line-height: 1.3;
    }

    /* Switch to mobile text */
    .desktop-text {
        display: none;
    }

    .mobile-text {
        display: block;
    }

    /* Sponsor logos for mobile */
    .sponsor-logo {
        width: 200px;
        height: 100px;
    }

    .sponsor-logo img {
        max-width: 180px;
        max-height: 90px;
    }

    .sponsors-track {
        gap: 40px;
        animation: scroll 15s linear infinite;
    }

    @keyframes scroll {
        0% {
            transform: translateX(0);
        }

        100% {
            transform: translateX(-100%);
        }
    }
}

@media (max-width: 480px) {
    .devfest-logo {
        max-width: clamp(120px, 80vw, 200px);
        margin-bottom: 30px;
    }

    .hero .date-badge {
        padding: 6px 10px;
        font-size: clamp(11px, 4.5vw, 14px);
        margin: 6px auto;
        max-width: 98%;
        line-height: 1.2;
    }

    #date-svg,
    #time-svg {
        width: clamp(12px, 6vw, 18px);
        height: clamp(12px, 6vw, 18px);
        margin-right: 4px;
    }

    .section-title {
        font-size: clamp(18px, 8vw, 28px);
        margin-bottom: 25px;
        padding: 0 20px;
        line-height: 1.4;
        letter-spacing: -1px;
    }

    .hero h1 {
        font-size: clamp(20px, 10vw, 40px);
        margin-bottom: 12px;
        padding: 0 20px;
        line-height: 1.4;
        letter-spacing: -2px;
    }

    /* Sponsor logos for small mobile */
    .sponsor-logo {
        width: 160px;
        height: 80px;
    }

    .sponsor-logo img {
        max-width: 140px;
        max-height: 70px;
    }

    .sponsors-track {
        gap: 30px;
        animation: scroll 18s linear infinite;
    }

    @keyframes scroll {
        0% {
            transform: translateX(0);
        }

        100% {
            transform: translateX(-100%);
        }
    }
}

/* Space Button Styles - Google Theme */
.hero-content a {
    display: inline-block;
    justify-content: center;
    /*margin: 2rem auto; */
}

.btn {
    display: inline-block;
    justify-content: center;
    align-items: center;
    width: 13rem;
    overflow: hidden;
    height: 3rem;
    background-size: 300% 300%;
    cursor: pointer;
    backdrop-filter: blur(1rem);
    border-radius: 5rem;
    transition: 0.5s;
    animation: gradient_301 5s ease infinite;
    border: double 4px transparent;
    background-image: linear-gradient(#212121, #212121),
        linear-gradient(137.48deg,
            #4285f4 10%,
            #ea4335 35%,
            #fbbc04 60%,
            #34a853 85%);
    background-origin: border-box;
    background-clip: content-box, border-box;
}

.hero-buttons {
    display: block;
    justify-content: center;
    gap: 80px;
    margin-top: 25px;
}

.btn.btn-small {
    width: 11rem;
    /* normal butondan biraz daha küçük */
    height: 2.6rem;
    font-size: 10px;
    margin: 15px;
}

.btn.btn-small strong {
    font-size: 11px;
    /* yazı boyutu küçültüldü */
    letter-spacing: 3px;
}

#container-stars {
    position: absolute;
    z-index: -1;
    width: 100%;
    height: 100%;
    overflow: hidden;
    transition: 0.5s;
    backdrop-filter: blur(1rem);
    border-radius: 5rem;
}

.btn strong {
    z-index: 2;
    font-family: "Avalors Personal Use";
    font-size: 12px;
    letter-spacing: 5px;
    color: #ffffff;
    text-shadow: 0 0 4px white;
}

#glow {
    position: absolute;
    display: flex;
    width: 12rem;
}

.circle {
    width: 100%;
    height: 30px;
    filter: blur(2rem);
    animation: pulse_3011 4s infinite;
    z-index: -1;
}

.circle:nth-of-type(1) {
    background: rgba(66, 133, 244, 0.636);
}

.circle:nth-of-type(2) {
    background: rgba(234, 67, 53, 0.704);
}

.btn:hover #container-stars {
    z-index: 1;
    background-color: #212121;
}

.btn:hover {
    transform: scale(1.1);
}

.btn:active {
    border: double 4px #ea4335;
    background-origin: border-box;
    background-clip: content-box, border-box;
    animation: none;
}

.btn:active .circle {
    background: #ea4335;
}

#stars {
    position: relative;
    background: transparent;
    width: 200rem;
    height: 200rem;
}

#stars::after {
    content: "";
    position: absolute;
    top: -10rem;
    left: -100rem;
    width: 100%;
    height: 100%;
    animation: animStarRotate 90s linear infinite;
}

#stars::after {
    background-image: radial-gradient(#ffffff 1px, transparent 1%);
    background-size: 50px 50px;
}

#stars::before {
    content: "";
    position: absolute;
    top: 0;
    left: -50%;
    width: 170%;
    height: 500%;
    animation: animStar 60s linear infinite;
}

#stars::before {
    background-image: radial-gradient(#ffffff 1px, transparent 1%);
    background-size: 50px 50px;
    opacity: 0.5;
}

@keyframes animStar {
    from {
        transform: translateY(0);
    }

    to {
        transform: translateY(-135rem);
    }
}

@keyframes animStarRotate {
    from {
        transform: rotate(360deg);
    }

    to {
        transform: rotate(0);
    }
}

@keyframes gradient_301 {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

@keyframes pulse_3011 {
    0% {
        transform: scale(0.75);
        box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.7);
    }

    70% {
        transform: scale(1);
        box-shadow: 0 0 0 10px rgba(0, 0, 0, 0);
    }

    100% {
        transform: scale(0.75);
        box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
    }
}

/* Sponsors Section */
#sponsors {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

/* Dark mode adjustments */
body.dark-mode .sponsor-card {
    background: var(--card-bg);
    border-color: var(--card-border);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

body.dark-mode .sponsor-card img {
    filter: none;
}