:root {
    --bg-gradient: #0a0a0a;
    --surface-bg: #171717;
    --surface-border: #262626;
    --text-primary: #fafafa;
    --text-secondary: #a3a3a3;
    --accent-primary: #ffffff;
    --accent-secondary: #d4d4d8;
    --accent-hover: #e5e5e5;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --shadow-glow: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    overflow-x: hidden;
    position: relative;
}



.generator-container {
    background: var(--surface-bg);
    border: 1px solid var(--surface-border);
    border-radius: 24px;
    padding: 2.5rem;
    width: 100%;
    max-width: 500px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    z-index: 1;
}

header {
    margin-bottom: 2rem;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.02em;
}

header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.display-section {
    position: relative;
    margin-bottom: 2rem;
}

.password-display {
    display: flex;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
    padding: 0.5rem;
    margin-bottom: 0.75rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.password-display:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--shadow-glow);
}

.password-display input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 1.25rem;
    font-weight: 500;
    padding: 1rem;
    width: 100%;
    outline: none;
    text-align: center;
    letter-spacing: 2px;
}

.action-btn {
    background: var(--surface-bg);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    border-radius: 12px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
}

.action-btn:hover {
    background: var(--accent-primary);
    color: #000;
    border-color: var(--accent-primary);
    box-shadow: 0 4px 15px var(--shadow-glow);
}

.action-btn:active {
    background: var(--accent-hover);
}

.action-btn.copied,
.action-btn.saved {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.strength-meter {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 0.5rem;
}

.strength-bar {
    flex-grow: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.strength-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--danger);
    transition: width 0.4s ease, background-color 0.4s ease;
}

.strength-text {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    min-width: 60px;
    text-align: right;
}

.controls-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.length-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.length-header label {
    font-weight: 500;
    color: var(--text-primary);
}

.length-value {
    background: rgba(0, 242, 254, 0.15);
    color: #00f2fe;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 10px var(--shadow-glow);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.type-selector {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--surface-border);
}

.radio-option {
    position: relative;
}

.radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.radio-option label {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.radio-option label:hover {
    background: rgba(255, 255, 255, 0.05);
}

.radio-custom {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--text-secondary);
    position: relative;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    transition: transform 0.2s ease;
}

.radio-option input[type="radio"]:checked~label .radio-custom {
    border-color: var(--accent-primary);
}

.radio-option input[type="radio"]:checked~label .radio-custom::after {
    transform: translate(-50%, -50%) scale(1);
}

.label-text strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
}

.label-text span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: opacity 0.3s;
}

.checkbox-option.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.checkbox-option input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border-radius: 6px;
    border: 2px solid var(--text-secondary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.checkbox-custom::after {
    content: '';
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform 0.2s ease;
    margin-bottom: 2px;
}

.checkbox-option input[type="checkbox"]:checked~.checkbox-custom {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-option input[type="checkbox"]:checked~.checkbox-custom::after {
    transform: rotate(45deg) scale(1);
}

.preset-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.preset-btn.active {
    background: rgba(0, 242, 254, 0.15);
    color: #00f2fe;
    border-color: #00f2fe;
}

.generate-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px var(--shadow-glow);
    margin-top: 0.5rem;
}

.generate-btn:hover {
    box-shadow: 0 8px 25px var(--shadow-glow);
    background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
}

.generate-btn:active {
    background: var(--accent-hover);
}


/* Add responsive styling */
@media (max-width: 480px) {
    .generator-container {
        padding: 1.5rem;
    }

    .checkbox-group {
        grid-template-columns: 1fr;
    }
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(16, 185, 129, 0.9);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
    transition: bottom 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 10000;
    pointer-events: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.toast.show {
    bottom: 40px;
}

/* Modals & Vault UI */
.vault-btn {
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.vault-btn:hover {
    background: var(--accent-primary);
    color: #000;
    box-shadow: 0 4px 15px var(--shadow-glow);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-card {
    background: #0f172a;
    border: 1px solid var(--surface-border);
    border-radius: 20px;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-card h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.custom-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: white;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1rem;
    margin-bottom: 1.5rem;
    outline: none;
    transition: all 0.2s;
}

.custom-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--shadow-glow);
}

.modal-actions {
    display: flex;
    gap: 1rem;
}

.btn-secondary {
    flex: 1;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Vault List Specific */
.vault-card {
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

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

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    transition: color 0.2s;
}

.btn-icon:hover {
    color: var(--danger);
}

.vault-list {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-right: 5px;
}

.vault-list::-webkit-scrollbar {
    width: 6px;
}

.vault-list::-webkit-scrollbar-thumb {
    background: var(--surface-border);
    border-radius: 3px;
}

.vault-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.vault-item:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 242, 254, 0.05);
}

.vault-item-info strong {
    display: block;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.vault-item-info span {
    font-family: ui-monospace, monospace;
    color: var(--text-primary);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.vault-item-actions {
    display: flex;
    gap: 0.5rem;
}

.vault-act-btn {
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
}

.vault-act-btn:hover {
    background: var(--accent-primary);
    color: #000;
}

.vault-act-btn.delete-btn:hover {
    background: var(--danger);
    color: white;
}

/* Tabs */
.app-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.35rem;
    border-radius: 12px;
    margin-top: 1.5rem;
    gap: 0.25rem;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--surface-bg);
    color: var(--text-primary);
    box-shadow: 0 4px 15px var(--shadow-glow);
}

/* Hardener Tool Styles */
.hardener-results {
    margin-top: 2rem;
    display: none;
    animation: fadeIn 0.5s ease;
}

.hardener-results.active {
    display: block;
}

.hard-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: transform 0.2s, border-color 0.2s;
}

.hard-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
}

.hard-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.hard-card-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.hard-password-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    font-family: ui-monospace, monospace;
    font-size: 1.1rem;
    word-break: break-all;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.hard-explanation {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.hard-timer {
    text-align: center;
    margin: 1.5rem 0;
    font-size: 0.9rem;
    color: var(--warning);
    font-weight: 600;
}

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

/* Light Mode Overrides */
body.light-mode {
    --bg-gradient: #f0f4f8;
    --surface-bg: #ffffff;
    --surface-border: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-primary: #2563eb;
    --accent-secondary: #3b82f6;
    --accent-hover: #1d4ed8;
    --shadow-glow: rgba(37, 99, 235, 0.2);
}

body.light-mode .generator-container,
body.light-mode .modal-card {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

body.light-mode .password-display,
body.light-mode .type-selector,
body.light-mode .app-tabs,
body.light-mode .hard-card,
body.light-mode .hard-password-row {
    background: rgba(0, 0, 0, 0.03);
    border-color: var(--surface-border);
}

body.light-mode .preset-btn,
body.light-mode .vault-item,
body.light-mode .custom-input,
body.light-mode .vault-act-btn,
body.light-mode .btn-secondary {
    background: rgba(0, 0, 0, 0.04);
}

body.light-mode .preset-btn:hover,
body.light-mode .vault-item:hover,
body.light-mode .vault-act-btn:hover,
body.light-mode .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.08);
}

body.light-mode .preset-btn.active {
    background: rgba(37, 99, 235, 0.15);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

body.light-mode .length-value {
    background: rgba(37, 99, 235, 0.15);
    color: var(--accent-primary);
}

body.light-mode .vault-btn {
    background: rgba(37, 99, 235, 0.1);
}

body.light-mode .vault-btn:hover {
    background: var(--accent-primary);
    color: white;
}

body.light-mode .strength-bar,
body.light-mode input[type="range"] {
    background: rgba(0, 0, 0, 0.1);
}

body.light-mode .checkbox-custom,
body.light-mode .radio-custom {
    background: rgba(255, 255, 255, 1);
}

body.light-mode .modal-card {
    background: var(--surface-bg);
}

body.light-mode .checkbox-option input[type="checkbox"]:checked~.checkbox-custom {
    background: var(--accent-primary);
}

.download-extension-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: #000;
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 4px 15px var(--shadow-glow);
    transition: all 0.3s ease;
    z-index: 1000;
}

.download-extension-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow-glow);
    background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
}

body.light-mode .download-extension-btn {
    color: white;
}