/* ═══════════════════════════════════════════
   FileTools.ru — UI Upgrade v15
   Beautiful progress bars, animations, micro-interactions
   ═══════════════════════════════════════════ */

/* ─── Enhanced Progress Bar (replaces old thin bar) ─── */
.progress-bar {
    width: 100%;
    background: var(--bg);
    border-radius: 16px;
    overflow: hidden;
    margin: 20px 0;
    display: none;
    border: 1px solid var(--border);
    position: relative;
    height: 28px;
}
.progress-bar .fill {
    height: 100%;
    border-radius: 16px;
    background: linear-gradient(90deg, #4f46e5, #7c3aed, #a855f7, #7c3aed, #4f46e5);
    background-size: 300% 100%;
    animation: gradient-flow 2s ease infinite;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
}
.progress-bar .fill::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer-bar 1.5s ease infinite;
}
.progress-bar .pct-label {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--text);
    z-index: 2;
    text-shadow: 0 1px 2px rgba(255,255,255,0.8);
}

@keyframes gradient-flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
@keyframes shimmer-bar {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ─── Step Progress (for multi-step tools) ─── */
.step-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin: 24px 0;
}
.step-item {
    display: flex;
    align-items: center;
    gap: 0;
}
.step-circle {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: var(--text-light);
}
.step-circle.active {
    border-color: var(--primary);
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 12px rgba(79,70,229,0.3);
    transform: scale(1.1);
}
.step-circle.done {
    border-color: var(--success);
    background: var(--success);
    color: #fff;
}
.step-line {
    width: 48px; height: 3px;
    background: var(--border);
    transition: background 0.3s;
}
.step-line.done { background: var(--success); }
.step-label {
    font-size: 0.72rem;
    color: var(--text-light);
    text-align: center;
    margin-top: 4px;
    max-width: 80px;
}

/* ─── Toast Notifications ─── */
.toast-container {
    position: fixed;
    top: 76px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}
.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 20px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    pointer-events: auto;
    animation: toast-in 0.4s cubic-bezier(0.21, 1.02, 0.73, 1) forwards;
    max-width: 360px;
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }
.toast-icon { font-size: 1.3rem; flex-shrink: 0; }
.toast.removing { animation: toast-out 0.3s ease forwards; }

@keyframes toast-in {
    from { opacity: 0; transform: translateX(100px) scale(0.9); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toast-out {
    to { opacity: 0; transform: translateX(100px) scale(0.9); }
}

/* ─── Enhanced Upload Area ─── */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(135deg, #fafbff 0%, #f0f4f8 100%);
    position: relative;
    overflow: hidden;
}
.upload-area::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(79,70,229,0.03) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}
.upload-area:hover::before { opacity: 1; }
.upload-area:hover {
    border-color: var(--primary);
    background: linear-gradient(135deg, #eef2ff 0%, #e8ecff 100%);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(79, 70, 229, 0.15);
}
.upload-area.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: scale(1.02);
    box-shadow: 0 16px 40px rgba(79, 70, 229, 0.2);
}
.upload-area .icon {
    font-size: 3.2rem;
    margin-bottom: 12px;
    transition: transform 0.3s;
}
.upload-area:hover .icon { transform: scale(1.15) translateY(-4px); }
.upload-area .label { font-size: 1.08rem; font-weight: 700; margin-bottom: 6px; }
.upload-area .hint { font-size: 0.85rem; color: var(--text-light); }

/* File selected state */
.upload-area.has-file {
    border-color: var(--success);
    border-style: solid;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}
.upload-area.has-file .icon::after { content: ' ✓'; color: var(--success); }

/* ─── Enhanced Result Block ─── */
.result {
    display: none;
    text-align: center;
    padding: 36px;
    position: relative;
}
.result.show {
    display: block;
    animation: result-appear 0.6s cubic-bezier(0.21, 1.02, 0.73, 1);
}
@keyframes result-appear {
    0% { opacity: 0; transform: translateY(30px) scale(0.95); }
    60% { transform: translateY(-5px) scale(1.01); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}
.result .success-icon {
    font-size: 3.2rem;
    margin-bottom: 12px;
    animation: success-bounce 0.6s ease 0.2s;
}
@keyframes success-bounce {
    0%, 100% { transform: scale(1); }
    30% { transform: scale(1.3); }
    60% { transform: scale(0.95); }
}

/* ─── Enhanced Buttons ─── */
.btn-primary {
    background: var(--gradient);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: linear-gradient(transparent, rgba(255,255,255,0.1), transparent);
    transform: rotate(45deg) translateY(-100%);
    transition: transform 0.6s;
}
.btn-primary:hover::after { transform: rotate(45deg) translateY(0); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,0.4); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(79,70,229,0.3); }

.btn-success {
    position: relative;
    overflow: hidden;
}
.btn-success:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(16,185,129,0.35); }

/* Ripple effect on buttons */
.btn-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    transform: scale(0);
    animation: ripple 0.6s ease-out;
    pointer-events: none;
}
@keyframes ripple {
    to { transform: scale(4); opacity: 0; }
}

/* ─── Tool Cards Enhanced ─── */
.tool-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.tool-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(79,70,229,0.12);
    transform: translateY(-4px);
}
.tool-card:active { transform: translateY(-1px); }
.tool-card .tool-icon { transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); }
.tool-card:hover .tool-icon { transform: scale(1.2) rotate(-5deg); }

/* ─── Skeleton Loading ─── */
.skeleton {
    background: linear-gradient(90deg, var(--bg) 25%, #e8ecf2 50%, var(--bg) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.skeleton-text { height: 14px; margin-bottom: 8px; }
.skeleton-title { height: 22px; width: 60%; margin-bottom: 12px; }
.skeleton-circle { width: 48px; height: 48px; border-radius: 50%; }
.skeleton-card { height: 80px; }

/* ─── Confetti Canvas ─── */
#confetti-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 99999;
}

/* ─── Micro-interactions ─── */
.copy-btn { transition: all 0.2s; }
.copy-btn.copied {
    background: var(--success) !important;
    color: #fff !important;
    border-color: var(--success) !important;
}

/* Smooth number counter */
.counter { transition: all 0.3s ease; }

/* Pulsing dot for "online" indicator */
.pulse-dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    display: inline-block;
    animation: pulse-glow 2s infinite;
}
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
    50% { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}

/* ─── Floating Action Indicator ─── */
.ops-counter {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 10px 18px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    font-size: 0.82rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 500;
    transition: all 0.3s;
    cursor: pointer;
}
.ops-counter:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,0,0,0.15); }
.ops-counter .count { color: var(--primary); font-size: 1rem; }

/* ─── Page transition ─── */
.content-main {
    animation: page-fade-in 0.3s ease-out;
}
@keyframes page-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Pricing cards hover ─── */
.plan {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.plan:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

/* ─── Category section entry animation ─── */
.category-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.category-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─── Dark theme adjustments for new elements ─── */
[data-theme="dark"] .toast { background: #1a1a1a; border-color: #333; }
[data-theme="dark"] .upload-area { background: linear-gradient(135deg, #111 0%, #1a1a1a 100%); }
[data-theme="dark"] .upload-area:hover { background: linear-gradient(135deg, #1a1a2e 0%, #1a1a3a 100%); }
[data-theme="dark"] .upload-area.has-file { background: linear-gradient(135deg, #0a1a0a 0%, #1a2a1a 100%); }
[data-theme="dark"] .progress-bar { background: #222; border-color: #333; }
[data-theme="dark"] .progress-bar .pct-label { color: #e0e0e0; text-shadow: none; }
[data-theme="dark"] .ops-counter { background: #1a1a1a; border-color: #333; }
[data-theme="dark"] .skeleton { background: linear-gradient(90deg, #1a1a1a 25%, #2a2a2a 50%, #1a1a1a 75%); background-size: 200% 100%; }