:root {
    --star-teal: #4f9aae;
    --deep-ink: #173640;
    --night-line: #2f5660;
    --cloud: #f7fbfc;
    --mist: #e2f0f3;
    --signal: #f0b44d;
    --white: #ffffff;
    --shadow: 0 24px 70px rgba(23, 54, 64, 0.14);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--deep-ink);
    background:
        linear-gradient(120deg, rgba(79, 154, 174, 0.08), transparent 34rem),
        linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(226, 240, 243, 0.38)),
        var(--cloud);
    font-family: "Microsoft JhengHei", "Noto Sans TC", "PingFang TC", Arial, sans-serif;
    line-height: 1.7;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

button,
input {
    font: inherit;
}

.protected-logo {
    user-select: none;
    -webkit-user-drag: none;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    margin: 0;
    padding: 10px max(16px, calc((100vw - 1120px) / 2));
    background: rgba(247, 251, 252, 0.9);
    backdrop-filter: blur(14px);
}

.brand img {
    width: 116px;
    height: auto;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 0;
    padding: 0;
    background: transparent;
    color: var(--star-teal);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transform-origin: center;
    transition: opacity 180ms ease, transform 180ms ease;
}

.site-header.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.site-header.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.site-header.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    color: rgba(23, 54, 64, 0.76);
    font-size: 0.95rem;
    font-weight: 700;
}

.site-nav a,
.button,
.copy-one {
    border-radius: 6px;
}

.site-nav a[aria-current="page"] {
    color: var(--star-teal);
}

.nav-dropdown {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-dropdown::after {
    content: "";
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    height: 0.8rem;
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.7rem);
    left: 50%;
    z-index: 20;
    display: grid;
    min-width: 148px;
    border: 1px solid rgba(79, 154, 174, 0.24);
    border-radius: 8px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 48px rgba(23, 54, 64, 0.12);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -4px);
    transition: opacity 160ms ease, transform 160ms ease;
}

.nav-dropdown-menu a {
    color: rgba(23, 54, 64, 0.76);
    padding: 8px 10px;
    white-space: nowrap;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

.site-nav a:focus-visible,
.nav-toggle:focus-visible,
.button:focus-visible,
.copy-one:focus-visible,
.brand:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(240, 180, 77, 0.72);
    outline-offset: 4px;
}

.password-page-header {
    border-bottom: 1px solid rgba(79, 154, 174, 0.24);
    padding: clamp(2.6rem, 6vw, 4.5rem) 0 clamp(1.6rem, 4vw, 2.4rem);
}

h1 {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    font-size: clamp(2.5rem, 5.2vw, 4.7rem);
    font-weight: 900;
    letter-spacing: 0;
    line-height: 1.08;
    text-align: center;
}

.password-tool {
    width: min(860px, calc(100% - 32px));
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(4rem, 9vw, 7rem);
}

.generator-panel {
    display: grid;
    gap: clamp(1.7rem, 4vw, 2.7rem);
}

.output-row {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.password-output {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 0.85rem;
    min-width: 0;
    flex: 1 1 auto;
    min-height: 54px;
    border: 1px solid rgba(79, 154, 174, 0.34);
    border-radius: 999px;
    padding: 8px 12px 8px 28px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: inset 0 1px 6px rgba(23, 54, 64, 0.08);
}

.password-output code {
    min-width: 0;
    overflow-wrap: anywhere;
    color: var(--deep-ink);
    font-family: Consolas, "Courier New", monospace;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.4;
}

.strength-badge {
    border-radius: 999px;
    padding: 3px 10px;
    background: rgba(79, 154, 174, 0.14);
    color: var(--star-teal);
    font-size: 0.78rem;
    font-weight: 900;
    white-space: nowrap;
}

.strength-badge[data-level="very-weak"],
.strength-badge[data-level="weak"] {
    background: #e94b2e;
    color: var(--white);
}

.strength-badge[data-level="good"] {
    background: var(--signal);
    color: var(--deep-ink);
}

.strength-badge[data-level="strong"],
.strength-badge[data-level="very-strong"] {
    background: var(--star-teal);
    color: var(--white);
}

.button,
.icon-button,
.step-button,
.copy-one {
    cursor: pointer;
    font-weight: 900;
}

.icon-button,
.step-button {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(79, 154, 174, 0.34);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.72);
    color: var(--star-teal);
    font-size: 1.35rem;
    line-height: 1;
}

.icon-button {
    width: 34px;
    height: 34px;
    border: 0;
    color: var(--deep-ink);
    font-size: 1.25rem;
}

.button {
    min-height: 54px;
    border: 0;
    border-radius: 999px;
    padding: 0 28px;
    box-shadow: 0 16px 34px rgba(23, 108, 210, 0.18);
}

.generate-button {
    background: var(--deep-ink);
    color: var(--white);
}

.copy-button {
    background: #1474e8;
    color: var(--white);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.46;
    box-shadow: none;
}

.control-row {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 1.1rem;
    align-items: center;
}

.control-row label,
.character-options legend {
    color: var(--deep-ink);
    font-weight: 900;
}

.control-row strong {
    color: var(--star-teal);
}

.range-control,
.count-control {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: center;
}

.count-control {
    grid-template-columns: auto 120px auto;
    justify-content: start;
}

input[type="range"] {
    width: 100%;
    accent-color: #1474e8;
}

input[type="number"] {
    width: 100%;
    border: 1px solid rgba(79, 154, 174, 0.26);
    border-radius: 999px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.86);
    color: var(--deep-ink);
    font-weight: 800;
    text-align: center;
}

.character-options {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    align-items: center;
    border: 0;
    margin: 0;
    padding: 0;
}

.character-options legend {
    margin-right: 0.75rem;
}

.option-card {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    cursor: pointer;
}

.option-card input {
    width: 22px;
    height: 22px;
    margin: 0;
    accent-color: #1474e8;
}

.option-card span {
    color: var(--deep-ink);
    font-family: Consolas, "Courier New", monospace;
    font-size: 1.05rem;
    font-weight: 900;
}

.copy-one {
    border: 1px solid rgba(79, 154, 174, 0.28);
    border-radius: 6px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.78);
    color: var(--deep-ink);
    white-space: nowrap;
}

.password-list {
    display: grid;
    gap: 10px;
}

.password-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
    border: 1px solid rgba(79, 154, 174, 0.18);
    border-radius: 8px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.72);
}

.password-row code {
    min-width: 0;
    overflow-wrap: anywhere;
    color: var(--deep-ink);
    font-family: Consolas, "Courier New", monospace;
    font-size: 1rem;
    font-weight: 700;
}

.copy-status {
    min-height: 1.7em;
    margin: 0;
    color: rgba(23, 54, 64, 0.68);
    font-size: 0.92rem;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    margin: 0;
    border-top: 1px solid rgba(79, 154, 174, 0.24);
    padding: 26px max(16px, calc((100vw - 1120px) / 2)) 34px;
    background: rgba(247, 251, 252, 0.58);
    color: rgba(23, 54, 64, 0.66);
    font-size: 0.95rem;
}

@media (hover: hover) {
    .site-nav a:hover {
        color: var(--star-teal);
    }

    .button:hover,
    .copy-one:hover {
        transform: translateY(-1px);
    }
}

@media (max-width: 900px) {
    .site-header {
        flex-wrap: wrap;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        display: none;
        order: 3;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        border-top: 1px solid rgba(79, 154, 174, 0.2);
        padding-top: 0.75rem;
        gap: 0;
        overflow: visible;
    }

    .site-header.nav-open .site-nav {
        display: flex;
    }

    .site-nav > a,
    .nav-dropdown > a {
        padding: 0.7rem 0;
    }

    .nav-dropdown {
        display: block;
    }

    .nav-dropdown-menu {
        position: static;
        display: grid;
        min-width: 0;
        border: 0;
        border-left: 1px solid rgba(79, 154, 174, 0.24);
        border-radius: 0;
        margin: 0 0 0.35rem 0.4rem;
        padding: 0 0 0 0.75rem;
        background: transparent;
        box-shadow: none;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        transition: none;
    }

    .output-row {
        align-items: stretch;
        flex-wrap: wrap;
    }

    .password-output {
        flex-basis: 100%;
    }
}

@media (max-width: 620px) {
    .brand img {
        width: 136px;
    }

    .site-nav {
        font-size: 0.88rem;
    }

    .control-row {
        grid-template-columns: 1fr;
    }

    .range-control {
        gap: 0.65rem;
    }

    .count-control {
        grid-template-columns: auto minmax(96px, 120px) auto;
    }

    .character-options {
        gap: 0.85rem 1.15rem;
    }

    .password-row {
        grid-template-columns: 1fr;
    }

    .site-footer {
        flex-direction: column;
    }
}