@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap');

:root {
    /* ----- SUPER PREMIUM LIGHT THEME (Structured & High Contrast) ----- */
    --bg-gradient: linear-gradient(135deg, #f5f7fb 0%, #eef2ff 100%);
    --text-color: #334155; /* sophisticated soft slate-gray */
    
    /* Structured light-dark panels for balance */
    --panel-bg: rgba(255, 255, 255, 0.85); 
    --panel-border: rgba(15, 23, 42, 0.15); /* Stronger grey/slate border */
    --panel-shadow: 0 15px 35px -5px rgba(15, 23, 42, 0.1), 0 5px 15px rgba(0, 0, 0, 0.05); /* Sleek darker shadow */
    
    --title-gradient: linear-gradient(135deg, #1e3a8a 0%, #4338ca 50%, #6d28d9 100%); /* Deeper bold colors */
    --gradient-start: #1e3a8a;
    --gradient-mid: #4338ca;
    --gradient-end: #6d28d9;
    --stroke-color: #4338ca;
    --title-glow: drop-shadow(0 0 20px rgba(67, 56, 202, 0.2));
    
    --drop-bg: rgba(241, 245, 249, 0.8);
    --input-bg: rgba(255, 255, 255, 0.95);
    --input-border: rgba(15, 23, 42, 0.25); /* More visible dark borders for inputs */
    --input-shadow: inset 0 2px 6px rgba(15, 23, 42, 0.05);
}

/* Ensure the main tech frame border in Light mode is visibly dark and structured */
#techFrame { border-color: rgba(15, 23, 42, 0.4) !important; }
.dark #techFrame { border-color: rgba(96, 165, 250, 0.3) !important; }

/* Darken the accent corners for Light Theme */
#techFrame > div:not(.absolute.inset-0) {
    border-color: rgba(15, 23, 42, 0.8) !important;
}
.dark #techFrame > div:nth-child(1), .dark #techFrame > div:nth-child(4) { 
    border-color: rgba(59, 130, 246, 0.8) !important; 
}
.dark #techFrame > div:nth-child(2), .dark #techFrame > div:nth-child(3) { 
    border-color: rgba(168, 85, 247, 0.8) !important; 
}

.dark {
    /* ----- PREMIUM DARK THEME ----- */
    --bg-gradient: linear-gradient(135deg, #050505 0%, #0f172a 100%);
    --text-color: #ffffff; /* pure white to maximize contrast */
    
    --panel-bg: rgba(9, 14, 23, 0.85); /* Significantly darker, more opaque to block neon lines */
    --panel-border: rgba(255, 255, 255, 0.15); /* More visible framing */
    --panel-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.15);
    
    --title-gradient: linear-gradient(135deg, #e0e7ff 0%, #38bdf8 50%, #818cf8 100%);
    --gradient-start: #e0e7ff;
    --gradient-mid: #38bdf8;
    --gradient-end: #818cf8;
    --stroke-color: #38bdf8;
    --title-glow: drop-shadow(0 0 20px rgba(56, 189, 248, 0.5));
    
    --drop-bg: rgba(15, 23, 42, 0.4);
    --input-bg: #09090b;
    --input-border: rgba(255, 255, 255, 0.1);
    --input-shadow: inset 0 4px 6px -1px rgba(0,0,0,0.5);
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    background: var(--bg-gradient);
    min-height: 100vh;
    transition: background 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: -0.5px;
}
p, span, label, li { transition: color 0.3s; }
p { color: #6b7280; }
.dark p, .dark label, .dark li { 
    color: #e2e8f0 !important; /* Force high-contrast gray/white */
    text-shadow: 0 1px 2px rgba(0,0,0,0.8); /* Lift text off the panel */
}

/* Fix text gradient clipping so gradients are ALWAYS visible */
.title-glow {
    background: var(--title-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: var(--title-glow);
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--panel-border);
    box-shadow: var(--panel-shadow);
    border-radius: 16px;
    transition: all 0.4s ease;
}

/* Gradient Border for Drop Zone */
.gradient-border-box {
    position: relative;
    border-radius: 12px;
    background: var(--drop-bg);
    background-clip: padding-box;
    border: solid 2px transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}
.gradient-border-box::before {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0; left: 0;
    z-index: -1;
    margin: -2px;
    border-radius: inherit;
    background: linear-gradient(135deg, #3b82f6, #a855f7);
    opacity: 0.25;
    transition: opacity 0.3s ease, box-shadow 0.3s ease;
}
.dark .gradient-border-box::before { 
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
    opacity: 0.6; 
}
.gradient-border-box:hover::before {
    opacity: 0.8;
}
.dark .gradient-border-box:hover::before {
    opacity: 1;
}
.gradient-border-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 0 2px rgba(99,102,241,0.2), 0 10px 30px rgba(99,102,241,0.2);
    border-color: #6366f1;
}
.dark .gradient-border-box:hover {
    box-shadow: 0 0 0 2px rgba(56,189,248,0.3), 0 10px 30px rgba(56,189,248,0.2);
    border-color: #38bdf8;
}
.gradient-border-box.dragging {
    background: rgba(99, 102, 241, 0.08);
    border: 2px dashed #6366f1;
    transform: scale(1.02);
}
.dark .gradient-border-box.dragging {
    background: rgba(56, 189, 248, 0.1);
    border: 2px dashed #38bdf8;
}
.gradient-border-box:hover svg {
    color: #4f46e5 !important;
}
.dark .gradient-border-box:hover svg {
    color: #22d3ee !important;
    filter: drop-shadow(0 0 8px #22d3ee);
}

/* Inputs */
textarea {
    background: var(--input-bg) !important;
    border: 1px solid var(--input-border) !important;
    box-shadow: var(--input-shadow);
    color: var(--text-color);
    transition: all 0.3s ease;
}
textarea:focus {
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
    border-color: #2563eb !important;
    outline: none;
}
.dark textarea {
    color: #ffffff; /* Brighten input text */
}
.dark textarea:focus {
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
    border-color: #38bdf8 !important;
}

/* Glow Button */
.glow-button {
    background: linear-gradient(135deg, #2563eb, #6366f1);
    font-weight: 700;
    color: white;
    border-radius: 10px;
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}
.dark .glow-button {
    background: linear-gradient(135deg, #4f46e5, #8b5cf6);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.6);
}
.glow-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.5);
}
.dark .glow-button:hover {
    box-shadow: 0 0 30px rgba(139, 92, 246, 1);
}

/* Floating animation */
.floating { animation: float 6s ease-in-out infinite; }
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
    100% { transform: translateY(0px); }
}

/* Floating Side Action Buttons */
.side-action-btn {
    width: 52px;
    height: 52px;
    border-radius: 26px; /* Perfect Circle natively, expands into Capsule */
    display: flex;
    align-items: center;
    justify-content: flex-end; /* Align icon against the right edge */
    padding-right: 13px; /* Centers the 24px icon horizontally inside the 52px block */
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    box-shadow: var(--panel-shadow);
    color: var(--text-color);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 50;
    overflow: hidden; /* Hides the label entirely when collapsed */
    transform-origin: right center; /* Locks the right edge in place */
}
.side-action-btn:hover { 
    width: 140px; /* Capsule horizontal expand */
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    border-color: transparent;
    color: white !important;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4), 0 0 15px rgba(99, 102, 241, 0.6);
}
.dark .side-action-btn:hover { 
    background: linear-gradient(135deg, #0ea5e9, #3b82f6); /* Explicit deep blue gradient in dark mode */
    box-shadow: 0 10px 25px rgba(14, 165, 233, 0.4), 0 0 15px rgba(59, 130, 246, 0.6); 
    color: #ffffff !important;
}

/* Explicit Interactive Menu Labels */
.side-action-label {
    opacity: 0;
    white-space: nowrap;
    margin-right: 12px;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: opacity 0.2s;
}
.side-action-btn:hover .side-action-label {
    opacity: 1;
    transition-delay: 0.15s;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: #8b5cf6; border-radius: 4px; }

/* Splash Screen Animations & Premium Text Revaels */
.premium-text-anim-wide {
    animation: premiumTextRevealWide 1.5s cubic-bezier(0.165, 0.840, 0.440, 1.000) both;
}
.premium-text-anim {
    animation: premiumTextReveal 1.5s cubic-bezier(0.165, 0.840, 0.440, 1.000) both;
}

@keyframes premiumTextReveal {
    0% {
        opacity: 0;
        transform: translateY(15px);
        letter-spacing: 0.25em;
        filter: blur(8px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        letter-spacing: normal;
        filter: blur(0px);
    }
}

@keyframes premiumTextRevealWide {
    0% {
        opacity: 0;
        transform: translateY(15px);
        letter-spacing: 0.45em;
        filter: blur(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        letter-spacing: 0.1em; /* normal wide spacing */
        filter: blur(0px);
    }
}

.fade-in-delayed {
    animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) 1.2s both; 
}
@keyframes fade-in {
    0% { opacity: 0; transform: translateY(20px); filter: blur(5px); }
    100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.splash-exit {
    opacity: 0;
    transform: scale(1.1);
    pointer-events: none;
}

.app-enter {
    animation: app-appear 1.2s cubic-bezier(0.215, 0.610, 0.355, 1.000) both;
}
@keyframes app-appear {
    0% { opacity: 0; transform: translateY(40px) scale(0.95); filter: blur(10px); }
    100% { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

.fade-up-base {
    animation: fadeUp 0.6s ease cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* File Success Card UI */
.file-success-card {
    animation: successPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    width: 100%;
    position: relative;
}
.dark .file-success-card {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

@keyframes successPop {
    0% { transform: scale(0.9) translateY(10px); opacity: 0; }
    100% { transform: scale(1) translateY(0); opacity: 1; }
}

.file-size-badge {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
}
.dark .file-size-badge {
    background: rgba(96, 165, 250, 0.2);
    color: #93c5fd;
}

#clearFileBtn {
    transition: all 0.3s ease;
}
#clearFileBtn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444 !important;
    transform: scale(1.05);
}