/* static/style.css */
:root {
    /* Light Mode Variables (Nuansa Langit Siang Cerah) */
    --bg-color: #87CEEB; /* Sky blue */
    --bg-gradient: linear-gradient(to bottom, #87CEEB, #E0F6FF);
    --text-color: #333333;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.4);
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-text: #333;
    --pre-bg: rgba(240, 248, 255, 0.8);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark Mode Variables (Nuansa Langit Malam Tenang) */
    --bg-color: #0B1021; /* Very dark blue */
    --bg-gradient: linear-gradient(to bottom, #0B1021, #1B2755);
    --text-color: #E2E8F0;
    --card-bg: rgba(15, 23, 42, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --navbar-bg: rgba(15, 23, 42, 0.85);
    --input-bg: rgba(30, 41, 59, 0.8);
    --input-text: #E2E8F0;
    --pre-bg: rgba(15, 23, 42, 0.8);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Fix mobile text selection */
* {
    -webkit-tap-highlight-color: transparent;
}
.bg-success.bg-opacity-10 {
    user-select: text !important;
    -webkit-user-select: text !important;
}

/* Global Form Hints & Placeholders */
::placeholder {
    color: #6c757d;
    opacity: 1;
}
.form-text {
    color: #6c757d;
}

[data-theme="dark"] ::placeholder {
    color: #94a3b8 !important; /* Terang dan terbaca di dark mode */
    opacity: 0.8;
}

[data-theme="dark"] .form-text {
    color: #cbd5e1 !important; /* Soft tapi kontras di dark mode */
}

/* Fix Navbar Hamburger Icon di Dark Mode */
[data-theme="dark"] .navbar-toggler-icon {
    filter: invert(1) brightness(150%);
}
[data-theme="dark"] .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.2);
}

body {
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    transition: background 0.5s ease, color 0.5s ease;
    overflow-x: hidden;
    position: relative;
}

/* Navbar Glassmorphism */
.navbar {
    background-color: var(--navbar-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    transition: background 0.5s ease;
}

.navbar-nav .nav-link {
    color: var(--text-color) !important;
    opacity: 0.8;
}

.navbar-nav .nav-link.active {
    opacity: 1;
}

/* Card Glassmorphism */
.crypto-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 15px;
    box-shadow: 0 8px 32px var(--shadow-color);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

/* Inputs & Forms */
.form-control, .form-select {
    background-color: var(--input-bg);
    color: var(--input-text);
    border: 1px solid var(--card-border);
}

.form-control:focus, .form-select:focus {
    background-color: var(--input-bg);
    color: var(--input-text);
    box-shadow: 0 0 0 0.25rem rgba(135, 206, 235, 0.25);
    border-color: #87CEEB;
}

/* Area Hasil (Preformatted text) */
pre {
    background-color: var(--pre-bg);
    color: var(--text-color);
    border-radius: 8px;
    padding: 15px;
    border: 1px solid var(--card-border);
    white-space: pre-wrap;       /* CSS3 */
    white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
    white-space: -pre-wrap;      /* Opera 4-6 */
    white-space: -o-pre-wrap;    /* Opera 7 */
    word-wrap: break-word;       /* Internet Explorer 5.5+ */
}

/* ========================================= */
/* EFEK LANGIT (AWAN & BINTANG)              */
/* ========================================= */

.sky-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

/* Awan untuk Light Mode */
.cloud {
    position: absolute;
    background: #fff;
    border-radius: 50px;
    opacity: 0.8;
    animation: moveClouds linear infinite;
}

.cloud::before, .cloud::after {
    content: '';
    position: absolute;
    background: #fff;
    border-radius: 50%;
}

.cloud1 { width: 100px; height: 30px; top: 15%; left: -100px; animation-duration: 40s; }
.cloud1::before { width: 40px; height: 40px; top: -20px; left: 15px; }
.cloud1::after { width: 50px; height: 50px; top: -25px; left: 40px; }

.cloud2 { width: 120px; height: 40px; top: 35%; left: -150px; animation-duration: 55s; opacity: 0.6; }
.cloud2::before { width: 50px; height: 50px; top: -25px; left: 20px; }
.cloud2::after { width: 60px; height: 60px; top: -35px; left: 50px; }

.cloud3 { width: 80px; height: 25px; top: 60%; left: -80px; animation-duration: 35s; opacity: 0.7; }
.cloud3::before { width: 30px; height: 30px; top: -15px; left: 10px; }
.cloud3::after { width: 40px; height: 40px; top: -20px; left: 30px; }

.cloud4 { width: 90px; height: 35px; top: 25%; left: -120px; animation-duration: 45s; opacity: 0.85; animation-delay: 5s; }
.cloud4::before { width: 35px; height: 35px; top: -18px; left: 15px; }
.cloud4::after { width: 45px; height: 45px; top: -22px; left: 40px; }

.cloud5 { width: 110px; height: 38px; top: 75%; left: -140px; animation-duration: 50s; opacity: 0.65; animation-delay: 15s; }
.cloud5::before { width: 40px; height: 40px; top: -20px; left: 18px; }
.cloud5::after { width: 55px; height: 55px; top: -25px; left: 45px; }

@keyframes moveClouds {
    0% { transform: translateX(-150px); }
    100% { transform: translateX(120vw); }
}

[data-theme="dark"] .cloud {
    display: none; /* Sembunyikan awan di mode malam */
}

/* Bintang untuk Dark Mode */
.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    opacity: 0;
    animation: twinkle linear infinite;
    display: none;
}

[data-theme="dark"] .star {
    display: block;
}

/* Animasi berkelip */
@keyframes twinkle {
    0% { opacity: 0; transform: scale(0.5); }
    50% { opacity: 1; transform: scale(1.2); }
    100% { opacity: 0; transform: scale(0.5); }
}

/* Animasi Muncul untuk Hasil */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Tabel History */
.table-glass {
    color: var(--text-color);
    --bs-table-color: var(--text-color);
    --bs-table-bg: transparent;
    --bs-table-hover-color: var(--text-color);
    --bs-table-hover-bg: rgba(0, 0, 0, 0.04);
}

.table-glass th, .table-glass td {
    border-color: var(--card-border) !important;
    background-color: transparent !important;
    color: var(--text-color) !important;
}

.table-glass thead th {
    background-color: rgba(0, 0, 0, 0.05) !important;
    font-weight: 600;
}

/* Dark Mode Penyesuaian Khusus Tabel History */
[data-theme="dark"] .table-glass {
    --bs-table-hover-bg: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .table-glass thead th {
    background-color: rgba(255, 255, 255, 0.08) !important;
    color: #f8fafc !important; /* Sangat terang & kontras untuk header */
    border-bottom: 1px solid rgba(255, 255, 255, 0.2) !important;
}

[data-theme="dark"] .table-glass td {
    color: #e2e8f0 !important; /* Terang dan elegan untuk isi tabel */
    border-color: rgba(255, 255, 255, 0.1) !important; /* Border halus */
}

/* ========================================= */
/* DYNAMIC DARK MODE & VISUALISASI           */
/* ========================================= */

/* Hill & Playfair Cipher Readability in Dark Mode */
.dynamic-text-muted { color: #6c757d; }
.dynamic-text { color: inherit; }
.dynamic-text-success { color: #198754; }
.dynamic-card-border { border-color: rgba(0, 0, 0, 0.125); }
.dynamic-border-bottom { border-bottom: 1px solid rgba(0,0,0,0.1); }
.dynamic-header-bg { background-color: rgba(13, 110, 253, 0.05); }
.dynamic-footer-bg { background-color: rgba(25, 135, 84, 0.05); }
.dynamic-bg-code { background-color: rgba(0, 0, 0, 0.05); }

[data-theme="dark"] .dynamic-text-muted { color: #94a3b8; } /* Slate 400 - Lebih terang */
[data-theme="dark"] .dynamic-text { color: #e2e8f0; } /* Slate 200 */
[data-theme="dark"] .dynamic-text-success { color: #4ade80; } /* Green 400 */
[data-theme="dark"] .dynamic-card-border { border-color: rgba(255, 255, 255, 0.15); }
[data-theme="dark"] .dynamic-border-bottom { border-bottom: 1px solid rgba(255,255,255,0.15); }
[data-theme="dark"] .dynamic-header-bg { background-color: rgba(13, 110, 253, 0.15); }
[data-theme="dark"] .dynamic-footer-bg { background-color: rgba(74, 222, 128, 0.1); }
[data-theme="dark"] .dynamic-bg-code { background-color: rgba(255, 255, 255, 0.1); }

/* ========================================= */
/* PLAYFAIR & HILL TABLE STYLES              */
/* ========================================= */

.playfair-table {
    background-color: var(--input-bg) !important;
    color: var(--input-text) !important;
    --bs-table-bg: transparent;
    --bs-table-color: var(--input-text);
}

.playfair-table td, .playfair-table th {
    border-color: var(--card-border) !important;
    color: var(--input-text) !important;
}

/* Ukuran cell & transisi dasar */
.pf-cell {
    width: 45px;
    height: 45px;
    transition: all 0.3s ease;
}

/* Efek saat user hanya menghover cell di tabel */
.pf-cell:hover {
    background-color: rgba(13, 110, 253, 0.1) !important; /* Soft blue */
    text-shadow: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05); /* Soft drop shadow instead of glow */
    transform: scale(1.1);
    z-index: 10;
    position: relative;
    border-radius: 6px;
}

/* Highlight via Javascript (saat step di hover) */
.highlight-source {
    background-color: rgba(13, 110, 253, 0.25) !important; /* Soft biru */
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.15); /* Shadow depth ringan */
    border: 1px solid rgba(13, 110, 253, 0.4) !important; /* Border untuk mempertegas batas */
    font-weight: bold;
    border-radius: 6px;
    color: #0B1021 !important; /* Teks tegas */
}

.highlight-result {
    background-color: rgba(25, 135, 84, 0.25) !important; /* Soft hijau */
    box-shadow: 0 2px 6px rgba(25, 135, 84, 0.15);
    border: 1px solid rgba(25, 135, 84, 0.4) !important;
    font-weight: bold;
    border-radius: 6px;
    color: #0B1021 !important;
}

/* Penyesuaian Khusus Dark Mode untuk Tabel Playfair */
[data-theme="dark"] .playfair-table td {
    color: #e2e8f0 !important; /* Putih kalem/slate 200 */
    border-color: rgba(255, 255, 255, 0.1) !important; /* Border tabel halus */
}

/* Warna highlight di dark mode: soft, clean, elegant, tanpa neon */
[data-theme="dark"] .highlight-source {
    background-color: rgba(59, 130, 246, 0.25) !important; /* Biru malam soft */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3); /* Shadow gelap untuk kedalaman */
    border: 1px solid rgba(59, 130, 246, 0.4) !important;
    color: #f8fafc !important; /* Teks putih jelas */
    text-shadow: none; /* Tanpa neon */
}

[data-theme="dark"] .highlight-result {
    background-color: rgba(34, 197, 94, 0.2) !important; /* Hijau malam soft */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(34, 197, 94, 0.4) !important;
    color: #f8fafc !important;
    text-shadow: none;
}

/* Hover cell biasa di dark mode: soft highlight */
[data-theme="dark"] .pf-cell:hover {
    background-color: rgba(255, 255, 255, 0.08) !important; /* Transparansi sangat tipis */
    text-shadow: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

/* ========================================= */
/* MATH MATRIX STYLES (HILL CIPHER)          */
/* ========================================= */

.math-matrix-container {
    padding: 1rem 0;
    margin-bottom: 1rem;
    scrollbar-width: thin;
}

.matrix-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.math-matrix {
    position: relative;
    border-collapse: collapse;
    margin: 0;
    background-color: transparent !important;
}

.math-matrix::before,
.math-matrix::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 6px;
    border: 2px solid var(--text-color);
    opacity: 0.7;
}

.math-matrix::before {
    left: -4px;
    border-right: none;
}

.math-matrix::after {
    right: -4px;
    border-left: none;
}

.math-matrix td {
    padding: 0.25rem 0.6rem;
    font-family: monospace, monospace;
    font-size: 1.1rem;
    color: var(--text-color);
    text-align: center;
    border: none !important;
}

[data-theme="dark"] .math-matrix::before,
[data-theme="dark"] .math-matrix::after {
    border-color: #94a3b8; /* Slate 400 */
    opacity: 0.8;
}

[data-theme="dark"] .math-matrix td {
    color: #e2e8f0; /* Slate 200 */
    text-shadow: 0 0 5px rgba(148, 163, 184, 0.2); /* Sangat soft glow agar tidak tenggelam */
}

/* ========================================= */
/* HILL CIPHER MATRIX INPUT MODERN           */
/* ========================================= */

/* Container grid matrix */
.hill-matrix-input-grid {
    display: grid;
    gap: 12px;
    margin-top: 12px;
    justify-content: start;
}

/* Mode 2x2 */
.hill-grid-2 {
    grid-template-columns: repeat(2, 70px);
}

/* Mode 3x3 */
.hill-grid-3 {
    grid-template-columns: repeat(3, 70px);
}

/* Input kotak matrix */
.hill-matrix-cell {
    width: 70px;
    height: 70px;

    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;

    border-radius: 14px;

    background: var(--input-bg);
    color: var(--input-text);

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

    transition: all 0.25s ease;

    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.05),
        0 4px 12px rgba(0,0,0,0.06);
}

/* Focus effect */
.hill-matrix-cell:focus {
    outline: none;

    border-color: #3b82f6;

    transform: translateY(-2px) scale(1.03);

    box-shadow:
        0 0 0 3px rgba(59,130,246,0.15),
        0 8px 20px rgba(59,130,246,0.15);
}

/* Hover effect */
.hill-matrix-cell:hover {
    transform: translateY(-2px);

    box-shadow:
        0 8px 20px rgba(0,0,0,0.08);
}

/* Dark mode */
[data-theme="dark"] .hill-matrix-cell {

    background:
        linear-gradient(
            145deg,
            rgba(30,41,59,0.95),
            rgba(15,23,42,0.95)
        );

    color: #f8fafc;

    border: 1px solid rgba(255,255,255,0.08);

    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.03),
        0 6px 18px rgba(0,0,0,0.35);
}

/* Hover dark */
[data-theme="dark"] .hill-matrix-cell:hover {

    border-color: rgba(59,130,246,0.4);

    box-shadow:
        0 0 0 2px rgba(59,130,246,0.08),
        0 10px 24px rgba(0,0,0,0.45);

    transform: translateY(-2px);
}

/* Focus dark */
[data-theme="dark"] .hill-matrix-cell:focus {

    border-color: #60a5fa;

    box-shadow:
        0 0 0 3px rgba(96,165,250,0.18),
        0 10px 25px rgba(0,0,0,0.5);

    color: #ffffff;
}

/* Mobile responsive */
@media (max-width: 576px) {

    .hill-grid-2 {
        grid-template-columns: repeat(2, 60px);
    }

    .hill-grid-3 {
        grid-template-columns: repeat(3, 60px);
    }

    .hill-matrix-cell {
        width: 60px;
        height: 60px;
        font-size: 1.1rem;
    }
}

/* MODE CARD CUSTOM - BEDA DARI SPLIT BUTTON */
.mode-card-group {
    display: grid;
    gap: 12px;
}

.mode-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: var(--input-bg);
    color: var(--input-text);
    border: 1px solid var(--card-border);
    cursor: pointer;
    transition: all 0.25s ease;
}

.mode-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.mode-card strong {
    display: block;
    font-size: 0.95rem;
}

.mode-card span {
    display: block;
    font-size: 0.78rem;
    opacity: 0.75;
    margin-top: 2px;
}

.mode-icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-size: 1.1rem;
}

.encrypt-icon {
    background: rgba(13, 110, 253, 0.12);
    color: #0d6efd;
}

.decrypt-icon {
    background: rgba(25, 135, 84, 0.12);
    color: #198754;
}

.btn-check:checked + .mode-card {
    border-color: #0d6efd;
    background: rgba(13, 110, 253, 0.12);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.12);
}

[data-theme="dark"] .mode-card {
    background: rgba(15, 23, 42, 0.7);
    border-color: rgba(255,255,255,0.12);
}

[data-theme="dark"] .btn-check:checked + .mode-card {
    background: rgba(59, 130, 246, 0.16);
    border-color: rgba(96, 165, 250, 0.8);
}

/* ========================================= */
/* CRYPTOSKY PROCESS BUTTON                  */
/* ========================================= */

.crypto-process-btn {
    position: relative;

    width: 100%;
    overflow: hidden;

    border: none;
    border-radius: 18px;

    padding: 15px 20px;

    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.3px;

    color: white;

    background:
        linear-gradient(
            135deg,
            #4facfe,
            #00c6fb
        );

    box-shadow:
        0 10px 25px rgba(79,172,254,0.25);

    transition: all 0.3s ease;
}

/* Hover */
.crypto-process-btn:hover {

    transform: translateY(-2px);

    box-shadow:
        0 14px 30px rgba(79,172,254,0.35);
}

/* Klik */
.crypto-process-btn:active {

    transform: scale(0.98);
}

/* Glow animation */
.btn-glow {

    position: absolute;

    top: 0;
    left: -120%;

    width: 80%;
    height: 100%;

    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(255,255,255,0.35),
            transparent
        );

    transform: skewX(-20deg);

    animation: glowSlide 3s infinite;
}

@keyframes glowSlide {

    0% {
        left: -120%;
    }

    100% {
        left: 130%;
    }
}

/* Dark mode */
[data-theme="dark"] .crypto-process-btn {

    background:
        linear-gradient(
            135deg,
            #2563eb,
            #3b82f6
        );

    box-shadow:
        0 12px 30px rgba(37,99,235,0.35);
}

.crypto-stack-layout {
    display: flex;
    flex-direction: column;
    gap: 28px;
    max-width: 980px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.stack-input,
.stack-result {
    width: 100%;
}

.stack-input .crypto-card,
.stack-result .crypto-card {
    border-radius: 28px;
}

.stack-result .crypto-card {
    min-height: 420px;
}