:root,
[data-theme="dark"] {
    --color-bg-base:        #080b12;
    --color-bg-surface:     #0f1420;
    --color-bg-elevated:    #161d2e;
    --color-bg-overlay:     #1c2438;
    --color-bg-muted:       #222b3d;

    --color-border-base:    #1e2a3d;
    --color-border-subtle:  #263044;
    --color-border-strong:  #2e3d58;

    --color-text-primary:   #e8edf5;
    --color-text-secondary: #8fa3c0;
    --color-text-muted:     #546a87;
    --color-text-disabled:  #3a4d65;
    --color-text-inverse:   #080b12;

    --color-blue-50:        #e8f0fe;
    --color-blue-100:       #c5d8fc;
    --color-blue-200:       #93b8f9;
    --color-blue-300:       #5e96f5;
    --color-blue-400:       #3b7af0;
    --color-blue-500:       #2563eb;
    --color-blue-600:       #1d52cc;
    --color-blue-700:       #1640a8;
    --color-blue-800:       #0f2f84;
    --color-blue-900:       #091f60;
    --color-blue-glow:      rgba(37, 99, 235, 0.35);

    --color-green-50:       #e6faf3;
    --color-green-100:      #c0f2e0;
    --color-green-200:      #86e8c4;
    --color-green-300:      #4dd9a6;
    --color-green-400:      #22c88a;
    --color-green-500:      #10b981;
    --color-green-600:      #0a9a6a;
    --color-green-700:      #077a53;
    --color-green-800:      #045a3c;
    --color-green-900:      #023a27;
    --color-green-glow:     rgba(16, 185, 129, 0.35);

    --color-orange-50:      #fff7ed;
    --color-orange-100:     #ffedd5;
    --color-orange-200:     #fed7aa;
    --color-orange-300:     #fdba74;
    --color-orange-400:     #fb923c;
    --color-orange-500:     #f97316;
    --color-orange-600:     #ea6c0a;
    --color-orange-700:     #c2570a;
    --color-orange-800:     #9a420a;
    --color-orange-900:     #7c3409;
    --color-orange-glow:    rgba(249, 115, 22, 0.35);

    --color-red-500:        #ef4444;
    --color-red-600:        #dc2626;
    --color-red-glow:       rgba(239, 68, 68, 0.35);

    --color-yellow-400:     #facc15;
    --color-yellow-500:     #eab308;

    --color-cyan-400:       #22d3ee;
    --color-cyan-500:       #06b6d4;

    --color-primary:        var(--color-blue-500);
    --color-primary-hover:  var(--color-blue-600);
    --color-primary-glow:   var(--color-blue-glow);
    --color-success:        var(--color-green-500);
    --color-success-hover:  var(--color-green-600);
    --color-success-glow:   var(--color-green-glow);
    --color-warning:        var(--color-orange-500);
    --color-warning-hover:  var(--color-orange-600);
    --color-warning-glow:   var(--color-orange-glow);
    --color-danger:         var(--color-red-500);
    --color-danger-hover:   var(--color-red-600);
    --color-danger-glow:    var(--color-red-glow);

    --shadow-sm:   0 1px 4px rgba(0, 0, 0, 0.4);
    --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg:   0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-xl:   0 16px 56px rgba(0, 0, 0, 0.7);

    --theme-icon-sun:   block;
    --theme-icon-moon:  none;
}

[data-theme="light"] {
    --color-bg-base:        #f0f4f8;
    --color-bg-surface:     #ffffff;
    --color-bg-elevated:    #f8fafc;
    --color-bg-overlay:     #eef2f7;
    --color-bg-muted:       #e2e8f0;

    --color-border-base:    #cbd5e1;
    --color-border-subtle:  #dde4ed;
    --color-border-strong:  #b0bec5;

    --color-text-primary:   #0f172a;
    --color-text-secondary: #334155;
    --color-text-muted:     #64748b;
    --color-text-disabled:  #94a3b8;
    --color-text-inverse:   #f8fafc;

    --color-blue-500:       #2563eb;
    --color-blue-600:       #1d52cc;
    --color-blue-glow:      rgba(37, 99, 235, 0.22);

    --color-green-500:      #10b981;
    --color-green-600:      #0a9a6a;
    --color-green-glow:     rgba(16, 185, 129, 0.22);

    --color-orange-500:     #f97316;
    --color-orange-600:     #ea6c0a;
    --color-orange-glow:    rgba(249, 115, 22, 0.22);

    --color-red-500:        #ef4444;
    --color-red-600:        #dc2626;
    --color-red-glow:       rgba(239, 68, 68, 0.22);

    --color-primary:        var(--color-blue-500);
    --color-primary-hover:  var(--color-blue-600);
    --color-primary-glow:   var(--color-blue-glow);
    --color-success:        var(--color-green-500);
    --color-success-hover:  var(--color-green-600);
    --color-success-glow:   var(--color-green-glow);
    --color-warning:        var(--color-orange-500);
    --color-warning-hover:  var(--color-orange-600);
    --color-warning-glow:   var(--color-orange-glow);
    --color-danger:         var(--color-red-500);
    --color-danger-hover:   var(--color-red-600);
    --color-danger-glow:    var(--color-red-glow);

    --shadow-sm:   0 1px 4px rgba(0, 0, 0, 0.08);
    --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg:   0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl:   0 16px 56px rgba(0, 0, 0, 0.2);

    --theme-icon-sun:   none;
    --theme-icon-moon:  block;
}

:root {
    --font-sans:        'Inter', 'Segoe UI', Arial, sans-serif;
    --font-mono:        'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm:        6px;
    --radius-md:        10px;
    --radius-lg:        14px;
    --radius-xl:        20px;
    --radius-full:      9999px;

    --transition-fast:  0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base:  0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:  0.4s cubic-bezier(0.4, 0, 0.2, 1);

    --container-max:    1500px;
    --container-pad:    28px;

    --z-base:           1;
    --z-dropdown:       100;
    --z-sticky:         200;
    --z-overlay:        300;
    --z-modal:          400;
    --z-toast:          500;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: clip;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-base);
    min-height: 100vh;
    overflow-x: clip;
    transition: background-color var(--transition-slow), color var(--transition-slow);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

input,
textarea,
select,
[contenteditable="true"] {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: none;
}

a img,
button img {
    pointer-events: auto;
}

main,
footer {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

img,
svg,
video {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

ul,
ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Diagonal Shimmer Hover ── */
.shimmer-hover {
    position: relative;
    overflow: hidden;
}

.shimmer-hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(
        105deg,
        transparent 0%,
        rgba(255, 255, 255, 0.08) 50%,
        transparent 100%
    );
    transform: skewX(-20deg);
    transition: left 0.55s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 1;
}

.shimmer-hover:hover::before {
    left: 150%;
}

/* ── Tema Geçiş Butonu ── */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-bg-overlay);
    border: 1.5px solid var(--color-border-base);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.theme-toggle:hover {
    color: var(--color-text-primary);
    border-color: var(--color-primary);
    box-shadow: 0 0 18px var(--color-primary-glow);
}

.theme-toggle .icon-sun {
    display: var(--theme-icon-sun);
}

.theme-toggle .icon-moon {
    display: var(--theme-icon-moon);
}

/* ── Butonlar ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    border: 1.5px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: 0 0 22px var(--color-primary-glow);
}

.btn-success {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: #ffffff;
}

.btn-success:hover {
    background-color: var(--color-success-hover);
    border-color: var(--color-success-hover);
    box-shadow: 0 0 22px var(--color-success-glow);
}

.btn-warning {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
    color: #ffffff;
}

.btn-warning:hover {
    background-color: var(--color-warning-hover);
    border-color: var(--color-warning-hover);
    box-shadow: 0 0 22px var(--color-warning-glow);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border-strong);
    color: var(--color-text-secondary);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
    box-shadow: 0 0 22px var(--color-primary-glow);
}

/* ── Kart ── */
.card {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border-base);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border-strong);
}

/* ── Rozet ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.badge-blue {
    background-color: rgba(37, 99, 235, 0.18);
    color: var(--color-blue-300);
    border: 1px solid rgba(37, 99, 235, 0.3);
}

.badge-green {
    background-color: rgba(16, 185, 129, 0.18);
    color: var(--color-green-300);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-orange {
    background-color: rgba(249, 115, 22, 0.18);
    color: var(--color-orange-300);
    border: 1px solid rgba(249, 115, 22, 0.3);
}

.badge-red {
    background-color: rgba(239, 68, 68, 0.18);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ── Form Elemanları ── */
.form-input {
    width: 100%;
    height: 46px;
    background-color: var(--color-bg-overlay);
    border: 1.5px solid var(--color-border-base);
    border-radius: var(--radius-sm);
    padding: 0 16px;
    color: var(--color-text-primary);
    font-size: 14px;
    font-family: var(--font-sans);
    outline: none;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    border-color: var(--color-primary);
    background-color: var(--color-bg-elevated);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

/* ── Divider ── */
.divider {
    width: 100%;
    height: 1px;
    background-color: var(--color-border-base);
    margin: 24px 0;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-base);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

::selection {
    background-color: rgba(37, 99, 235, 0.3);
    color: var(--color-text-primary);
}

@media (max-width: 1024px) {
    :root {
        --container-pad: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-pad: 16px;
    }
}

@media (max-width: 480px) {
    :root {
        --container-pad: 12px;
    }
}

/* ── SweetAlert2 Theme Override ── */
.swal2-popup {
    background: var(--color-bg-surface) !important;
    border: 1px solid var(--color-border-base) !important;
    border-radius: var(--radius-lg) !important;
    color: var(--color-text-primary) !important;
    font-family: var(--font-sans) !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4) !important;
}

.swal2-title {
    color: var(--color-text-primary) !important;
    font-size: 18px !important;
    font-weight: 700 !important;
}

.swal2-html-container,
.swal2-content {
    color: var(--color-text-secondary) !important;
    font-size: 14px !important;
}

.swal2-icon {
    border-color: var(--color-border-base) !important;
}

.swal2-icon.swal2-success {
    border-color: #10b981 !important;
    color: #10b981 !important;
}

.swal2-icon.swal2-success .swal2-success-ring {
    border-color: rgba(16, 185, 129, 0.3) !important;
}

.swal2-icon.swal2-error {
    border-color: #ef4444 !important;
    color: #ef4444 !important;
}

.swal2-icon.swal2-question {
    border-color: var(--color-primary) !important;
    color: var(--color-primary) !important;
}

.swal2-icon.swal2-warning {
    border-color: #f59e0b !important;
    color: #f59e0b !important;
}

.swal2-confirm {
    background: var(--color-primary) !important;
    color: #fff !important;
    border-radius: var(--radius-md) !important;
    font-weight: 700 !important;
    font-family: var(--font-sans) !important;
    padding: 10px 24px !important;
    font-size: 14px !important;
    box-shadow: none !important;
    transition: background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base) !important;
}

.swal2-confirm:hover {
    background: var(--color-blue-600) !important;
    box-shadow: 0 0 18px var(--color-primary-glow) !important;
}

.swal2-cancel {
    background: var(--color-bg-elevated) !important;
    color: var(--color-text-secondary) !important;
    border: 1px solid var(--color-border-base) !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    font-family: var(--font-sans) !important;
    padding: 10px 24px !important;
    font-size: 14px !important;
    box-shadow: none !important;
    transition: background-color var(--transition-base), border-color var(--transition-base) !important;
}

.swal2-cancel:hover {
    background: var(--color-bg-overlay) !important;
    border-color: var(--color-border-strong) !important;
}

.swal2-timer-progress-bar {
    background: var(--color-primary) !important;
}

.swal2-close {
    color: var(--color-text-muted) !important;
}

.swal2-close:hover {
    color: var(--color-text-primary) !important;
}

.swal2-backdrop-show {
    background: rgba(0, 0, 0, 0.65) !important;
}

@media (max-width: 480px) {
    :root {
        --container-pad: 12px;
    }
}

/* ── Yukarı Çık Butonu ── */
.scroll-top-btn {
    position: fixed;
    bottom: 32px;
    right: 28px;
    z-index: 900;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-elevated);
    border: 1.5px solid var(--color-border-base);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 16px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), color var(--transition-base);
    pointer-events: none;
}

.scroll-top-btn.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.scroll-top-btn:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 18px var(--color-primary-glow);
    color: var(--color-text-primary);
}

@media (max-width: 480px) {
    .scroll-top-btn {
        bottom: 20px;
        right: 16px;
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
}