/* =====================================================
   FURKAN YALÇIN PORTFOLIO
   Global UI / Design System
===================================================== */


/* =====================================================
   RENKLER
===================================================== */

:root {
    --primary: 168 85 247;
    --primary-light: 192 38 211;

    --background: #09090b;
    --surface: #18181b;
    --surface-light: #27272a;

    --border: rgba(161, 161, 170, 0.12);
    --border-hover: rgba(168, 85, 247, 0.75);

    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;

    --purple-glow: rgba(168, 85, 247, 0.18);
}


/* =====================================================
   GLOBAL
===================================================== */

html {
    scroll-behavior: smooth;
}

body {
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    background: var(--background);
    color: var(--text-primary);

    overflow-x: hidden;

    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}


/* Metin seçimi */

::selection {
    background: rgba(168, 85, 247, 0.8);
    color: white;
}


/* =====================================================
   TYPOGRAPHY
===================================================== */

h1,
h2,
h3,
h4 {
    font-weight: 700;
    letter-spacing: -0.035em;
}

p {
    line-height: 1.7;
}

a {
    -webkit-tap-highlight-color: transparent;
}


/* =====================================================
   FOCUS / ACCESSIBILITY
===================================================== */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid rgb(var(--primary));
    outline-offset: 4px;
}


/* =====================================================
   SCROLLBAR
===================================================== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #09090b;
}

::-webkit-scrollbar-thumb {
    background: #3f3f46;
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgb(var(--primary));
}


/* =====================================================
   HELPERS
===================================================== */

.bg-primary {
    background-color: rgb(var(--primary));
}

.text-primary {
    color: rgb(var(--primary));
}

section {
    scroll-margin-top: 90px;
}


/* =====================================================
   HERO
===================================================== */

.hero-gradient {
    position: relative;

    background:
        radial-gradient(
            circle at 30% 20%,
            rgba(126, 34, 206, 0.16),
            transparent 35%
        ),
        radial-gradient(
            circle at 80% 70%,
            rgba(168, 85, 247, 0.1),
            transparent 40%
        ),
        linear-gradient(
            135deg,
            #09090b 0%,
            #120b20 50%,
            #09090b 100%
        );
}


/* Hafif noise hissi */

.hero-gradient::after {
    content: "";
    position: absolute;
    inset: 0;

    pointer-events: none;

    background-image:
        linear-gradient(
            rgba(255, 255, 255, 0.01) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.01) 1px,
            transparent 1px
        );

    background-size: 60px 60px;

    mask-image:
        linear-gradient(
            to bottom,
            rgba(0, 0, 0, 0.5),
            transparent
        );
}


/* =====================================================
   GRADIENT TEXT
===================================================== */

.gradient-text {
    background:
        linear-gradient(
            90deg,
            #d946ef,
            #a855f7,
            #7e22ce
        );

    -webkit-background-clip: text;
    background-clip: text;

    -webkit-text-fill-color: transparent;

    background-size: 200% auto;

    animation: gradientMove 6s ease infinite;
}

@keyframes gradientMove {

    0% {
        background-position: 0% center;
    }

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

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


/* =====================================================
   NAVIGATION
===================================================== */

nav {
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

nav a {
    position: relative;
}


/* Menü linki hover çizgisi */

nav a:not(.no-nav-effect)::after {
    content: "";

    position: absolute;

    left: 50%;
    bottom: -7px;

    width: 0;
    height: 2px;

    background:
        linear-gradient(
            90deg,
            #a855f7,
            #d946ef
        );

    border-radius: 999px;

    transform: translateX(-50%);

    transition: width 0.25s ease;
}

nav a:not(.no-nav-effect):hover::after {
    width: 45%;
}


/* =====================================================
   GENEL KART
===================================================== */

.card {
    position: relative;

    background:
        linear-gradient(
            145deg,
            rgba(30, 30, 36, 0.92),
            rgba(15, 15, 20, 0.95)
        );

    border: 1px solid var(--border);

    border-radius: 24px;

    overflow: hidden;

    transition:
        transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
        border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.card:hover {
    border-color: var(--border-hover);

    transform: translateY(-7px);

    box-shadow:
        0 25px 50px -20px rgba(0, 0, 0, 0.7),
        0 0 35px -15px var(--purple-glow);
}


/* =====================================================
   PROJECT CARDS
===================================================== */

.project-card {
    position: relative;

    background:
        linear-gradient(
            145deg,
            rgba(24, 24, 27, 0.92),
            rgba(15, 15, 18, 0.96)
        );

    border: 1px solid rgba(161, 161, 170, 0.1);

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    transition:
        transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.4s ease,
        border-color 0.4s ease;
}

.project-card::before {
    content: "";

    position: absolute;

    inset: 0;

    border-radius: inherit;

    pointer-events: none;

    background:
        radial-gradient(
            600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
            rgba(168, 85, 247, 0.04),
            transparent 40%
        );
}

.project-card:hover {
    border-color: rgba(168, 85, 247, 0.7);

    transform: translateY(-9px);

    box-shadow:
        0 30px 60px -25px rgba(0, 0, 0, 0.85),
        0 0 40px -20px rgba(168, 85, 247, 0.35);
}


/* Proje görselleri */

.project-card img {
    transition:
        transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
        filter 0.4s ease;
}

.project-card:hover img {
    transform: scale(1.045);
    filter: brightness(1.05);
}


/* =====================================================
   BLOG CARDS
===================================================== */

.blog-card {
    position: relative;

    transition:
        transform 0.35s ease,
        border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.blog-card:hover {
    transform: translateY(-6px);

    border-color: rgba(168, 85, 247, 0.55);

    box-shadow:
        0 20px 45px -25px rgba(168, 85, 247, 0.3);
}


/* =====================================================
   BUTTON / LINK EFFECTS
===================================================== */

button,
a {
    transition:
        color 0.25s ease,
        background-color 0.25s ease,
        border-color 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

button:active,
a:active {
    transform: scale(0.98);
}


/* =====================================================
   HOVER SCALE
===================================================== */

.hover-scale {
    transition:
        transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-scale:hover {
    transform: scale(1.025);
}


/* =====================================================
   FORM
===================================================== */

input,
textarea {
    transition:
        border-color 0.25s ease,
        box-shadow 0.25s ease,
        background-color 0.25s ease;
}

input:focus,
textarea:focus {
    border-color: rgb(var(--primary));

    box-shadow:
        0 0 0 3px rgba(168, 85, 247, 0.08);
}


/* Autofill rengini düzelt */

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
    -webkit-text-fill-color: #f4f4f5;

    -webkit-box-shadow:
        0 0 0 1000px #09090b inset;

    transition:
        background-color 9999s ease-in-out 0s;
}


/* =====================================================
   SCROLL REVEAL
===================================================== */

.reveal {
    opacity: 0;

    transform: translateY(32px);

    transition:
        opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;

    transform: translateY(0);
}


/* Kartların biraz farklı zamanda gelmesi için */

.reveal-delay-1 {
    transition-delay: 0.08s;
}

.reveal-delay-2 {
    transition-delay: 0.16s;
}

.reveal-delay-3 {
    transition-delay: 0.24s;
}


/* =====================================================
   SCROLL INDICATOR
===================================================== */

@keyframes scroll {

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

    70% {
        transform: translateY(17px);
        opacity: 0;
    }

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

.animate-scroll {
    animation:
        scroll 1.8s ease-in-out infinite;
}


/* =====================================================
   BACK TO TOP
===================================================== */

#back-to-top {
    position: fixed;

    bottom: 28px;
    right: 28px;

    width: 50px;
    height: 50px;

    border-radius: 9999px;

    display: none;

    align-items: center;
    justify-content: center;

    color: white;

    font-size: 21px;

    background:
        linear-gradient(
            135deg,
            #9333ea,
            #a855f7
        );

    border:
        1px solid rgba(255, 255, 255, 0.12);

    box-shadow:
        0 15px 35px -10px rgba(168, 85, 247, 0.55);

    z-index: 60;

    cursor: pointer;

    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        background 0.25s ease;
}

#back-to-top:hover {
    transform:
        translateY(-4px)
        scale(1.05);

    box-shadow:
        0 20px 45px -12px rgba(168, 85, 247, 0.75);
}


/* =====================================================
   FOOTER
===================================================== */

footer a {
    transition:
        color 0.25s ease,
        transform 0.25s ease;
}

footer a:hover {
    transform: translateY(-1px);
}




/* =====================================================
   MOBILE DRAWER SCROLL
===================================================== */

#mobile-menu {
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

/* Alt kısım mobil tarayıcı çubuğunun altında kalmasın */
#mobile-menu > div:last-child {
    padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}



/* =====================================================
   MOBILE HEADER COMPACT
===================================================== */

@media (max-width: 768px) {

    /* Üst navigasyonu mobilde biraz daha kompakt yap */
    body > nav > div {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
    }

    /* Hamburger butonunu biraz küçült */
    #menu-button {
        width: 44px !important;
        height: 44px !important;
        font-size: 1.5rem !important;
    }

    /* Açılan menünün üst kısmını da sıkılaştır */
    #mobile-menu > div:first-child {
        padding-top: 1rem !important;
        padding-bottom: 1rem !important;
    }

    /* Menü içeriğini biraz daha yukarı al */
    #mobile-menu > div:last-child {
        padding-top: 1.5rem !important;
    }
}

/* =====================================================
   RESPONSIVE
===================================================== */

@media (max-width: 768px) {

    h1 {
        letter-spacing: -0.025em;
    }

    h2,
    h3 {
        letter-spacing: -0.02em;
    }

    .project-card:hover,
    .card:hover,
    .blog-card:hover {
        transform: translateY(-4px);
    }

    #back-to-top {
        right: 18px;
        bottom: 18px;

        width: 46px;
        height: 46px;
    }
}


/* =====================================================
   REDUCED MOTION
===================================================== */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;

        scroll-behavior: auto !important;

        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* =========================
   TEKNOLOJİ ETİKETLERİ
   ========================= */

.tech-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;

    padding: 0.7rem 1rem;

    background: rgb(9 9 11);
    border: 1px solid rgb(39 39 42);

    border-radius: 0.9rem;

    color: rgb(212 212 216);

    font-size: 0.875rem;
    font-weight: 500;

    transition:
        border-color 0.25s ease,
        color 0.25s ease,
        transform 0.25s ease;
}

.tech-chip:hover {
    border-color: rgb(168 85 247);
    color: rgb(192 132 252);
    transform: translateY(-2px);
}