/* ===== Design Tokens ===== */
:root {
    --primary: #ff4600;
    --primary-soft: rgba(255, 70, 0, 0.08);
    --primary-glow: rgba(255, 70, 0, 0.25);
    --bg: #f0f0f3;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(255, 255, 255, 0.6);
    --text: #1a1a2e;
    --text-sub: #71717a;
    --input-bg: rgba(255, 255, 255, 0.7);
    --input-border: #e4e4e7;
    --input-focus: #ff4600;
    --danger: #ef4444;
    --success: #22c55e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --primary: #ff6b35;
    --primary-soft: rgba(255, 107, 53, 0.1);
    --primary-glow: rgba(255, 107, 53, 0.2);
    --bg: #0f0f13;
    --card-bg: rgba(30, 30, 38, 0.8);
    --card-border: rgba(255, 255, 255, 0.06);
    --text: #f4f4f5;
    --text-sub: #a1a1aa;
    --input-bg: rgba(39, 39, 42, 0.8);
    --input-border: #3f3f46;
    --input-focus: #ff6b35;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100dvh;
    margin: 0;
    padding: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, rgba(255, 70, 0, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 70, 0, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] body::before {
    background: radial-gradient(circle at 30% 20%, rgba(255, 107, 53, 0.06) 0%, transparent 45%),
        radial-gradient(circle at 70% 80%, rgba(255, 107, 53, 0.03) 0%, transparent 45%);
}

/* ===== Card ===== */
.card {
    position: relative;
    z-index: 1;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    padding: 2rem 1.75rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 420px;
    width: 100%;
    transition: transform var(--transition), box-shadow var(--transition);
}

h1 {
    background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

/* ===== Form ===== */
.form-group {
    margin-bottom: 1.1rem;
    text-align: left;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 1.25rem 0;
    color: var(--text-sub);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--input-border);
}

.divider::before {
    margin-right: 12px;
}

.divider::after {
    margin-left: 12px;
}

label {
    display: block;
    font-size: 0.8rem;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--text-sub);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* ===== Inputs ===== */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.input-wrapper input {
    width: 100%;
    padding: 13px 45px 13px 14px;
    background-color: var(--input-bg);
    color: var(--text);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: normal;
    height: 48px;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background-color: var(--input-bg);
}

.input-wrapper input::placeholder {
    color: var(--text-sub);
    opacity: 0.6;
}

.input-toggle {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-sub);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
    border-radius: 8px;
    transition: color var(--transition), background-color var(--transition), transform var(--transition);
    z-index: 2;
}

.input-toggle:hover {
    color: var(--primary);
    background-color: var(--primary-soft);
    transform: translateY(-50%) scale(1.1);
}

input.valid {
    border-color: var(--success) !important;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15) !important;
}

input.invalid {
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12) !important;
}

.validation-msg {
    font-size: 0.73rem;
    margin-top: 4px;
    display: none;
    font-weight: 500;
}

.validation-msg.error {
    display: block;
    color: var(--danger);
}

/* ===== Profile Manager ===== */
.profile-manager {
    display: flex;
    gap: 8px;
    margin-bottom: 1.25rem;
    align-items: center;
}

.profile-select {
    flex-grow: 1;
    padding: 10px 35px 10px 14px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    cursor: pointer;
    transition: all var(--transition);
}

.profile-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn-icon {
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    color: var(--text);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 1rem;
}

.btn-icon:hover {
    border-color: var(--primary);
    color: var(--primary);
    background-color: var(--primary-soft);
    transform: translateY(-1px);
}

.btn-icon:active {
    transform: translateY(0);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    color: var(--text);
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    line-height: 1;
    transition: transform var(--transition), box-shadow var(--transition);
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-md);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* ===== Buttons ===== */
button {
    background: linear-gradient(135deg, var(--primary) 0%, #ff7b2e 100%);
    color: white;
    border: none;
    padding: 13px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    width: 100%;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.2px;
}

button::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--primary-glow);
    opacity: 1;
}

button:hover::after {
    opacity: 1;
}

button:active {
    transform: translateY(0);
    box-shadow: none;
}

button.secondary {
    background: var(--input-bg);
    color: var(--text-sub);
    border: 1.5px solid var(--input-border);
    margin-top: 10px;
    font-weight: 600;
}

button.secondary::after {
    display: none;
}

button.secondary:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-soft);
    box-shadow: none;
    transform: translateY(-1px);
}

/* ===== QR Code Display ===== */
#qrcode {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
    padding: 16px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

#qrcode:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

#qrcode:active {
    transform: scale(0.98);
}

#qrcode img {
    display: block;
}

.info {
    color: var(--text-sub);
    font-size: 0.82rem;
    margin-top: 1.25rem;
    line-height: 1.6;
}

.info a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: opacity var(--transition);
}

.info a:hover {
    opacity: 0.8;
}

/* ===== Progress Bar ===== */
.progress-bar {
    height: 3px;
    background: var(--input-border);
    border-radius: var(--radius-full);
    margin-top: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, #ff8c42 100%);
    width: 100%;
    transform-origin: left;
    animation: progress 5s linear infinite;
    border-radius: var(--radius-full);
}

@keyframes progress {
    0% {
        transform: scaleX(1);
    }

    100% {
        transform: scaleX(0);
    }
}

/* ===== Hidden & Animations ===== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.fade-out {
    animation: fadeOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    to {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }
}

/* ===== Cooldown Banner ===== */
.cooldown-info {
    background: var(--primary-soft);
    border: 1px solid var(--primary-glow);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-top: 1rem;
    font-size: 0.82rem;
    color: var(--text);
    line-height: 1.5;
    text-align: center;
    font-weight: 500;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--text);
    color: var(--bg);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    box-shadow: var(--shadow-lg);
    z-index: 10000;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    width: 90%;
    max-width: 460px;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(24px) scale(0.96);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    max-height: 85vh;
    overflow-y: auto;
    text-align: left;
}

.modal-overlay.show .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.modal-close {
    background: var(--primary-soft);
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-sub);
    padding: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: all var(--transition);
}

.modal-close:hover {
    color: var(--primary);
    background: var(--primary-soft);
    transform: rotate(90deg);
    opacity: 1;
}

/* ===== Help Section ===== */
.help-section {
    margin-bottom: 1.5rem;
}

.help-section h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 700;
}

.help-section p {
    font-size: 0.9rem;
    color: var(--text-sub);
    line-height: 1.7;
    margin: 0;
}

.help-section h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin: 1.2rem 0 0.5rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
}

.help-section h4::before {
    content: '';
    width: 3px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

.image-placeholder {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 12px auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--input-border);
    box-shadow: var(--shadow-sm);
}

code {
    background-color: var(--primary-soft);
    padding: 2px 6px;
    border-radius: 6px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--primary);
    font-size: 0.85em;
    font-weight: 600;
}

.help-trigger {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    padding: 0;
    width: auto;
    margin-bottom: 1.2rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition);
}

.help-trigger:hover {
    opacity: 0.8;
    transform: translateX(2px);
}

/* ===== Footer ===== */
.footer {
    position: relative;
    z-index: 1;
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-sub);
    opacity: 0.7;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.footer a:hover {
    text-decoration: underline;
}

/* ===== Fullscreen Mode ===== */
#qrDisplay.fullscreen {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    background: #ffffff;
    z-index: 9999;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

[data-theme="dark"] #qrDisplay.fullscreen {
    background: #1a1a1a;
}

body.fullscreen-active > *:not(.card) {
    display: none !important;
}

body.fullscreen-active > .card {
    position: static;
    z-index: auto;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

#qrDisplay.fullscreen > *:not(#qrcode):not(.exit-fullscreen) {
    display: none !important;
}

#qrDisplay.fullscreen #qrcode {
    transform: scale(1.5);
    margin: 0;
    filter: contrast(1.15) brightness(1.1);
    box-shadow: none;
    border-radius: 0;
}

#qrDisplay.fullscreen #qrcode:hover {
    transform: scale(1.5);
    box-shadow: none;
}

.exit-fullscreen {
    display: none;
    position: absolute;
    bottom: 50px;
    background: rgba(0, 0, 0, 0.06);
    border: none;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: #666;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition);
}

.exit-fullscreen:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

[data-theme="dark"] .exit-fullscreen {
    background: rgba(255, 255, 255, 0.1);
    color: #ccc;
}

[data-theme="dark"] .exit-fullscreen:hover {
    background: rgba(255, 255, 255, 0.15);
}

#qrDisplay.fullscreen .exit-fullscreen {
    display: block;
}

/* ===== Custom Dialog ===== */
.dialog-modal {
    max-width: 360px;
    text-align: center;
}

.dialog-modal p {
    color: var(--text);
    font-size: 0.95rem;
    margin: 0.75rem 0 1.25rem;
    line-height: 1.5;
}

.dialog-input {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text);
    font-size: 0.95rem;
    margin-top: 8px;
    font-family: inherit;
}

.dialog-input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.dialog-actions {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
}

.dialog-actions button {
    flex: 1;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .card {
        padding: 1.5rem 1.25rem;
        border-radius: var(--radius-md);
    }

    h1 {
        font-size: 1.45rem;
    }

    #qrDisplay.fullscreen #qrcode {
        transform: scale(1.2);
    }
}

@media (hover: none) {
    button:hover {
        transform: none;
        box-shadow: none;
    }

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

    #qrcode:hover {
        transform: none;
        box-shadow: var(--shadow-sm);
    }

    .btn-icon:hover {
        transform: none;
    }
}